HEADERS!! HEADERS!! HEADERS!!

HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » June 17th 2019, 4:48am

the stock, original exhaust system on my '99 astro cargo 2WD is still in good condition but it's now 20 years old.
i wanted to research what i can replace the whole system with in 2019.
i thought writing up a post here would be a good way to organize what i've found and it might help anyone else with the same interest.

i'll start with a rundown of the stock exhaust system components with the GM part numbers.
i made the following searches as a 1999 astro cargo in 2WD and AWD versions.

cast iron exhaust manifolds (screen grabs from GM Parts Giant website)
i made searches for 2WD & AWD and got the same results :
mani1.jpeg
2WD search

mani2.jpeg
AWD search


left (driver's side) manifold part # 12552325 (screen grab from GM Parts Store because they have a downloadable full fitment list).
note manifold fits 1996 thru 2001 astro/safari, along with other vehicles :
manifolds2.jpeg
left manifold

manifolds3.jpeg
left manifold

manifolds4.jpeg
left manifold

manifolds5.jpeg
left manifold


right (passenger side) manifold part # 12550122 with fitment list from GM Parts Store.
note manifold fits 1996 thru 2005 astro/safari, along with other vehicles :
manifolds6.jpeg
right manifold

manifolds7.jpeg
right manifold

manifolds8.jpeg
right manifold

manifolds9.jpeg
right manifold


y-pipe with integral catalytic converter (first 2 screen grabs from GM Parts Store website):
cat1.jpeg
discontinued

cat2.jpeg
fitment list

same part number 1513680 still available at GM Parts Giant (searched as 2WD & AWD, got the same result):
cat3.jpeg
only $968.73

cat5.jpeg
AWD search



muffler & tailpipe assembly (first 2 screen grabs from GM Parts Store website):
muff3.jpeg
discontinued

muff4.jpeg
fitment list

same part number still available at Arnie Bauer Cad/Buick/GMC (searched as 2wd):
muff2.jpeg
only $539.54



for roughly $1800 plus tax & shipping i can buy new GM exhaust manifolds, y-pipe with cat & the muffler/tailpipe assembly.
YIKES :eek: :eek: !!!!!

i'll upload the post here to make sure it goes in OK then i'll continue..............
Last edited by stent on June 17th 2019, 9:45am, edited 3 times in total.
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby markmitch » June 17th 2019, 4:58am

better off going with after market hi flow converter and after market fully welded turbo muffler from Summit help the V6 breath better
Last edited by markmitch on June 17th 2019, 2:01pm, edited 1 time in total.
User avatar
markmitch
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 5 Cylinders (L6)
Firing on 5 Cylinders (L6)
Years of Membership: markmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full years
Posts: 5571
Topics: 608
Images: 20
Joined: March 2008
Location: California
Gender: Male
Alias (AKA): AstroMark or 1st gen
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: RS V8

Re: HEADERS!! HEADERS!! HEADERS!!

Postby Mmusicman » June 17th 2019, 11:00am

I didn't see ANY HEADERS!! HEADERS!! HEADERS!! :shock:
Image
2000 Astro LS 4x4 | NP233 | 31" LT265/70R17 Tires | 8" LIFT | 10" TOTAL
92 Chevy Astro Cargo Shorty | V8-350
http://www.CruisinSouthFlorida.com
User avatar
Mmusicman
V8 Swap Achievement
V8 Swap Achievement
Firing on 6 Cylinders (L5)
Firing on 6 Cylinders (L5)
Years of Membership: Mmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full years
Posts: 4607
Topics: 72
Images: 49
Joined: June 2013
Location: Ft. Lauderdale, Florida
Gender: Male
Alias (AKA): Scott
Van Model Year: 2000
Van Make/Model: Chevrolet Astro
Extra Info: 2000 4x4 - 92 V8-350

Re: HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » June 17th 2019, 3:28pm

markmitch wrote:better off going with after market hi flow converter and after market fully welded turbo muffler from Summit help the V6 breath better

what he said !!!
toooo expensive
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » June 17th 2019, 3:32pm

Mmusicman wrote:I didn't see ANY HEADERS!! HEADERS!! HEADERS!! :shock:


sorry to disappoint you Mmusicman, that was just the first installment.
i'm in geezer training & got sleepy & went to bed before i got to the good part. :sleep:
gotta go to work now - bear with me :wave:
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby Wiley » July 8th 2019, 5:45pm

Hey Rip Van Winkle, you alive?
2guys1truck.com: 2004 AWD Chevy Astro from California to Colombia!
User avatar
Wiley
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: Wiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full years
Posts: 239
Topics: 7
Joined: February 2014
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD 2 inch Lift

Re: HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » July 17th 2019, 6:44am

hi wiley,
had a great nap.
waiting on response from JBA headers then i'll finish this up.

until then i'll post a scan of the inspiration for the name for this little thread :
piles!piles!!piles!!!.jpeg
PILES! PILES!! PILES!!!

.......from the 1898 sears catalog...... :wave:
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby Astrofarian » July 17th 2019, 12:54pm

Ok....you get a pass. Headers/Piles, either way, it's all exhaust-related!

-M!ke-
Move along....all is well.....return to your homes.....nothing to see here.
User avatar
Astrofarian
Firing on 6 Cylinders (L3)
Firing on 6 Cylinders (L3)
Years of Membership: Astrofarian has been a member for 6 full yearsAstrofarian has been a member for 6 full yearsAstrofarian has been a member for 6 full yearsAstrofarian has been a member for 6 full yearsAstrofarian has been a member for 6 full yearsAstrofarian has been a member for 6 full years
Posts: 2672
Topics: 14
Joined: February 2014
Location: R.M. of Armstrong, Manitoba, Canada
Gender: Male
Alias (AKA): M!ke
Van Model Year: 1995
Van Make/Model: Chevrolet Astro
Extra Info: Someday......

Re: HEADERS!! HEADERS!! HEADERS!!

Postby Mmusicman » July 17th 2019, 3:49pm

I still don't see ANY headers... :shock:
Image
2000 Astro LS 4x4 | NP233 | 31" LT265/70R17 Tires | 8" LIFT | 10" TOTAL
92 Chevy Astro Cargo Shorty | V8-350
http://www.CruisinSouthFlorida.com
User avatar
Mmusicman
V8 Swap Achievement
V8 Swap Achievement
Firing on 6 Cylinders (L5)
Firing on 6 Cylinders (L5)
Years of Membership: Mmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full years
Posts: 4607
Topics: 72
Images: 49
Joined: June 2013
Location: Ft. Lauderdale, Florida
Gender: Male
Alias (AKA): Scott
Van Model Year: 2000
Van Make/Model: Chevrolet Astro
Extra Info: 2000 4x4 - 92 V8-350

Re: HEADERS!! HEADERS!! HEADERS!!

Postby chevymaherchevymaher is online! » July 19th 2019, 12:12pm

LOL clickbait CLICKBAIT CLICKBAIT.
Image
User avatar
chevymaherchevymaher is online!
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: chevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full years
Posts: 14184
Topics: 90
Images: 94
Joined: November 2010
Gender: Male
Alias (AKA): chevymaher
Van Model Year: 1994
Van Make/Model: GMC Safari
Extra Info: SLE RWD Mercruiser

Re: HEADERS!! HEADERS!! HEADERS!!

Postby joeg » July 21st 2019, 12:20am

EDIT: Deleted post. I thought I found some and then realized they were v8 headers even though they were listed for our vans.

Summit shows a bunch of 4.3 headers, but I'm guessing none fit our van?
https://www.summitracing.com/search/bra ... 4294948686
joeg
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: joeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full years
Posts: 271
Topics: 36
Images: 76
Joined: May 2016
Location: San Diego, CA
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby chevymaherchevymaher is online! » July 21st 2019, 12:44am

Full sized truck headers fit. They got 4.3 headers.

If you look hard enough years ago there was a thread and they actually gave the part numbers for the unicorns that fit.
Image
User avatar
chevymaherchevymaher is online!
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: chevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full yearschevymaher has been a member for 9 full years
Posts: 14184
Topics: 90
Images: 94
Joined: November 2010
Gender: Male
Alias (AKA): chevymaher
Van Model Year: 1994
Van Make/Model: GMC Safari
Extra Info: SLE RWD Mercruiser

Re: HEADERS!! HEADERS!! HEADERS!!

Postby joeg » July 21st 2019, 1:09am

chevymaher wrote:Full sized truck headers fit. They got 4.3 headers.

If you look hard enough years ago there was a thread and they actually gave the part numbers for the unicorns that fit.


Is this the thread you're referring to? https://www.astrosafari.com/viewtopic.php?f=24&t=130034

I see some 1st gen astros with part numbers... will any header that fits the first gen clear everything on the 3rd gen? And does AWD have clearance issues that RWD doesn't?
joeg
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: joeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full years
Posts: 271
Topics: 36
Images: 76
Joined: May 2016
Location: San Diego, CA
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby joeg » August 9th 2019, 5:46pm

I'm strongly considering headers, I already have a catback. Does anyone know for sure which headers fit a Gen3 AWD? I definitely do not want to find out they don't fit after I take off the manifold, lol.

The pacesetter and JBA headers in that thread look interesting, but I can't tell if the people who used them had an AWD van.
joeg
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: joeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full years
Posts: 271
Topics: 36
Images: 76
Joined: May 2016
Location: San Diego, CA
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » August 9th 2019, 9:02pm

sorry guys, been away from posting lately.
for me in denver with the emissions testing program my header choices will be limited to direct fit short headers (they bolt up to the factory y-pipe/catalytic converter assembly).
a currently available, matched, short header set for sale for a '99 astro doesn't exist from any manufacturer that i could find.
using the info from the scans i loaded at the beginning of this post, i looked for direct fit headers for vehicles that were factory equipped with the same exhaust manifolds as the astro manifolds.
i found Pacesetter & JBA header listings that cross-referenced for one side or the other.
i didn't see any Pacesetter headers in stainless steel, but JBA had listings in stainless.
i focused on the JBA stuff from there because of the hopefully increased lifespan of stainless steel.

the available, applicable JBA listings for the cross-referenced left side header would be : 1996>98, Chevrolet/GMC, C1500/K1500, full size trucks.
the header set number is 1842SJS.
1842SJS_full.jpg
full size set - left side is applicable

1842SJS.pdf
(425.82 KiB) Downloaded 32 times


the available, applicable JBA listings for the cross-referenced right side header would be : 1996-01, Chevrolet/GMC, S10 & S10 blazer, 4WD.

1842S-3.pdf
(389.01 KiB) Downloaded 32 times

1842S-3_full-1.jpg
S10 set - right side is applicable


JBA has discontinued production of these headers, that's why the left side number is for ceramic coated and the right side number is for bare stainless - that's all they have left.
the good news is that JBA will sell a mixed left/right header set from their available stock.
JBA only listed the S10 set in 4WD, but the GM manifold part number scans showed 2 & 4WD using the same manifolds.

i went ahead & ordered the headers with my tax return mad money, here's some pics :
hedd1.jpg

hedd2.jpg

hedd3.jpg

hedd4.jpg

hedd5.jpg

hedd6.jpg

hedd7.jpg

hedd8.jpg

hedd9.jpg

hedd10.jpg

hedd11.jpg

hedd12.jpg

hedd13.jpg

hedd14.jpg

hedd15.jpg

hedd16.jpg


will they fit ??
i don't know....... :shrug:
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby Mmusicman » August 9th 2019, 9:11pm

FINALLY!!! SOME HEADERS!!!
Even if they don't fit.. they sure look nice! :D
The block huggers look like they'd probably fit!
Image
2000 Astro LS 4x4 | NP233 | 31" LT265/70R17 Tires | 8" LIFT | 10" TOTAL
92 Chevy Astro Cargo Shorty | V8-350
http://www.CruisinSouthFlorida.com
User avatar
Mmusicman
V8 Swap Achievement
V8 Swap Achievement
Firing on 6 Cylinders (L5)
Firing on 6 Cylinders (L5)
Years of Membership: Mmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full yearsMmusicman has been a member for 7 full years
Posts: 4607
Topics: 72
Images: 49
Joined: June 2013
Location: Ft. Lauderdale, Florida
Gender: Male
Alias (AKA): Scott
Van Model Year: 2000
Van Make/Model: Chevrolet Astro
Extra Info: 2000 4x4 - 92 V8-350

Re: HEADERS!! HEADERS!! HEADERS!!

Postby joeg » August 9th 2019, 9:24pm

wow, those are pretty.

So you need a different left header and right header, rather than 1 set for 1 vehicle? sheesh. Still curious if they fit.

I'm considering the pacesetter 70-1355, but they're not stainless steel. However, I saw them on a 95 AWD in the thread I linked above, so I think they fit. After talking to Andy's autosport, they also offer the ceramic coated version:
https://www.andysautosport.com/products ... C1355.html (ignore the pic, they have the wrong stock photo, but their support was very knowledgeable)

If it fits a 95 AWD, it'll fit a 2004, right? I'm thinking of pulling the trigger
joeg
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: joeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full years
Posts: 271
Topics: 36
Images: 76
Joined: May 2016
Location: San Diego, CA
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby joeg » August 9th 2019, 10:08pm

After talking with @akforceten about his 2000 AWD with the pacesetter headers, I'm going to give the ceramic coated version a try. He has a 3" body lift, but hopefully my 2" will be enough, only 1 way to find out. He mentioned that you'll need spark plug wires with 90 degree boots and a little Y pipe modification.

FYI, Rockauto has them (Pacesetter 72C1355) for $256, which is WAY cheaper than everywhere else.
https://www.rockauto.com/en/parts/paces ... eader,5848 (plus 5% off with the coupon in vendor row)
joeg
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: joeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full yearsjoeg has been a member for 4 full years
Posts: 271
Topics: 36
Images: 76
Joined: May 2016
Location: San Diego, CA
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD Cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby stent [OP] » August 9th 2019, 10:47pm

hi joeg,
for my situation (1999) the different left & right side headers i bought should theoretically bolt up to the factory y-pipe.
the bigger question is whether or not they will fit my van body/chassis, because the header designers evidently never test fitted their headers to an astro/safari.

for your situation (2004) the right side should be the same from 1996 thru 2005 (per my research they all used exhaust manifold part # 12550122), so the right side header of the set you're looking at should theoretically fit your y-pipe. it appears that the astro/safari left side exhaust manifold part # changed for 2002 thru 2005 (from old # 12550122 to new # 12570693). i haven't researched this newer number to try & figure out what is different. looking at the thread you referenced, one of the posters spoke of an S10 left side header needing to be reworked to fit the astro body & it did not fit the y-pipe.
Original Poster [OP]
User avatar
stent
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: stent has been a member for 3 full yearsstent has been a member for 3 full yearsstent has been a member for 3 full years
Posts: 176
Topics: 2
Images: 188
Joined: May 2017
Alias (AKA):
Van Model Year: 1999
Van Make/Model: Chevrolet Astro
Extra Info: rwd cargo

Re: HEADERS!! HEADERS!! HEADERS!!

Postby AstroWill » August 11th 2019, 6:09pm

It's outlet location might have changed, compare the y-pipe between the two.
User avatar
AstroWill
Technical Director
Technical Director
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: AstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full years
Posts: 10938
Topics: 106
Images: 440
Joined: February 2009
Alias (AKA): Critical Thinking+Common Sense
Van Make/Model: Chevrolet Astro

Next

 
  • Related topics
    Replies
    Views
    Last post

Return to Exhaust

It is currently October 28th 2020, 6:47am

Exhaust Forum
ExhaustTopics regarding exhaust systems beginning at the headers down the pipes and through the catalytic converter and the mufflers and exhaust tips. We can also discuss emissions, performance cat back exhausts, or any exhaust related topics.
To create a new topic in Exhaust, click this button:
Previous topic Next topic
Recent Image Attachments
Attached by:
SheldonYoung
in Exhaust
Views: 283
Comments: 11
Date: Oct 03 '20
Time: 2:03pm
» Read last comment
Attached by:
Attached by: augidog
augidog
in Exhaust
Views: 1192
Comments: 38
Date: Sep 02 '20
Time: 4:20pm
» Read last comment
Attached by:
Attached by: sixsix
sixsix
in Exhaust
Views: 1192
Comments: 38
Date: Sep 02 '20
Time: 3:03pm
» Read last comment
Attached by:
Attached by: sixsix
sixsix
in Exhaust
Views: 1192
Comments: 38
Date: Sep 02 '20
Time: 2:43pm
» Read last comment
Attached by:
Attached by: Godron629
Godron629
in Exhaust
Views: 1192
Comments: 38
Date: Sep 02 '20
Time: 4:29am
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 3 guests