Which one is factory correct? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**IronCanine** · 04-03-2015, 07:48 AM

Which single exhaust routing is factory correct? Above or below the crossmember? Are they both correct? 2wd vs. 4wd...Thanks for your help guys...

asolde · 04-03-2015, 09:07 AM

I am not sure but the one with it going above the cross member makes more sense to me.

69-72 · 04-03-2015, 10:43 AM

My 2wd 3/4 ton looks like the first picture

smbrouss70 · 04-03-2015, 06:10 PM

Not sure if you have noticed or not, but you have a picture of a 2wd and a 4x4. The 2wd is correct under the crossmember, and the 4x4 is correct above the crossmember since it hangs down lower.

**IronCanine** · 04-03-2015, 11:26 PM

Quote:

Originally Posted by IronCanine

Which single exhaust routing is factory correct? Above or below the crossmember? Are they both correct? 2wd vs. 4wd...Thanks for your help guys...

Quote:

Originally Posted by smbrouss70

Not sure if you have noticed or not, but you have a picture of a 2wd and a 4x4. The 2wd is correct under the crossmember, and the 4x4 is correct above the crossmember since it hangs down lower.

...I did, that was my question. Those were the only two pics I have of Blazer crossover pipes that I think might actually be original. I am not sure. I thought they both might be correct. It makes sense to me too to go above the crossmember on my 4wd, but as you might imagine, it's hard to find pics of factory exhaust set ups.

smbrouss70 · 04-03-2015, 11:30 PM

My 2wd has sections of what I believe is the original exhast, but mine is a 4-speed for now, so it doesn't have the transmission crossmember back there. But it does pass underneath the trailing arm crossmember, so I would think that it would have gone underneath an automatic crossmember as well.

**IronCanine** · 04-03-2015, 11:34 PM

Quote:

Originally Posted by asolde

I am not sure but the one with it going above the cross member makes more sense to me.

Quote:

Originally Posted by 69-72

My 2wd 3/4 ton looks like the first picture

Quote:

Originally Posted by smbrouss70

My 2wd has sections of what I believe is the original exhast, but mine is a 4-speed for now, so it doesn't have the transmission crossmember back there. But it does pass underneath the trailing arm crossmember, so I would think that it would have gone underneath an automatic crossmember as well.

Thanks for the feedback guys. We're not going to be bending tubes for a few days anyway. Unless someone chimes in to the contrary, I think we'll be copying pic 2.

**DeadheadNM** · 04-05-2015, 11:48 AM

Above the x-member for sure. Toss in a t-case skid plate while you are down there

**PDXk5** · 04-11-2015, 01:33 AM

Quote:

Originally Posted by IronCanine

Which single exhaust routing is factory correct? Above or below the crossmember? Are they both correct? 2wd vs. 4wd...Thanks for your help guys...

That's my 72 4x4 in the photo. It's original exhaust routing. The pipes original to the muffler. My father-in-law was the original purchaser of the vehicle when it was new.

**IronCanine** · 04-11-2015, 07:19 AM

Quote:

Originally Posted by PDXk5

That's my 72 4x4 in the photo. It's original exhaust routing. The pipes original to the muffler. My father-in-law was the original purchaser of the vehicle when it was new.

Thanks for chiming in...I just wanted to confirm before we went to the exhaust shop since yours is literally the only original 4WD Blazer exhaust pics I've been able to come up with.

**1rippen6** · 04-24-2015, 07:36 PM

I know this is late and it appears you found you answer put thought I would had this for future questions

**IronCanine** · 04-24-2015, 08:52 PM

Quote:

Originally Posted by 1rippen6

I know this is late and it appears you found you answer put thought I would had this for future questions

Brilliant Dwayne...is that the Assembly Manual?...gosh, I'm embarrassed that it did not even occur to me to look there. The manual is such a PITA as you know. Ours is tagged and stickie noted and marked to death just so we've got a fighting chance of finding what we're looking for in under 10 minutes....and since the last time I picked it up was to look at the shroud mounting(and we're far enough along as to generally not need it), it's just been put to the side. Thanks for adding this to the thread. It definitely helps.

**1rippen6** · 04-24-2015, 09:57 PM

Got it from here

**IronCanine** · 04-24-2015, 10:01 PM

Quote:

Originally Posted by 1rippen6

Got it from here

That's awesome. Thanks. I guess I feel better that I didn't miss it in the AM...but it also makes me really want one of those.

**1rippen6** · 04-24-2015, 10:10 PM

Really not a lot of pictures but picked it up on ebay for 45 plus shipping.

04-03-2015, 07:48 AM	#1
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,759	Which one is factory correct? Which single exhaust routing is factory correct? Above or below the crossmember? Are they both correct? 2wd vs. 4wd...Thanks for your help guys... Attached Images __________________ 1970 K20 Z62 https://67-72chevytrucks.com/vboard/...56#post9334756 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

04-03-2015, 09:07 AM	#2
asolde Registered User Join Date: Apr 2012 Location: Henderson Nevada Posts: 804	Re: Which one is factory correct? I am not sure but the one with it going above the cross member makes more sense to me. __________________ 1972 cheverolet K5 CST Blazer 350/auto/AC/PS/PB/Aux Batt From Medford, Oregon

04-03-2015, 10:43 AM	#3
69-72 Registered User Join Date: May 2008 Location: 204 Posts: 903	Re: Which one is factory correct? My 2wd 3/4 ton looks like the first picture __________________ 1969 Chevy Custom Camper 3/4 ton Rust free survivor 1972 Chevy Blazer CST 4x4 Almost Rust free survivor 1972 GMC Jimmy 2wd Undergoing surgery

04-03-2015, 06:10 PM	#4
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,781	Re: Which one is factory correct? Not sure if you have noticed or not, but you have a picture of a 2wd and a 4x4. The 2wd is correct under the crossmember, and the 4x4 is correct above the crossmember since it hangs down lower. __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

04-03-2015, 11:30 PM	#6
smbrouss70 Registered User Join Date: Sep 2003 Location: Rayne, LA Posts: 2,781	Re: Which one is factory correct? My 2wd has sections of what I believe is the original exhast, but mine is a 4-speed for now, so it doesn't have the transmission crossmember back there. But it does pass underneath the trailing arm crossmember, so I would think that it would have gone underneath an automatic crossmember as well. __________________ Steven "If dogs don't go to heaven, when I die I want to go wherever they went." -- Will Rogers R.I.P. Oscar R.I.P. Ratchet 1967 Pontiac GTO - Dad was the Original Owner 1970 Chevy 2wd SWB "Oscar's Truck" 1970 Chevy 2wd Blazer "Ratchet's Blazer" 2013 Chevy 2500HD Crew Cab Duramax/Allison Z71 LTZ "Brown Sugar" 2017 Chevy Suburban "BDB" 2020 Chevy Blazer Premier "Foxy" Member of Louisiana Classic Truck Club (LCTC) Shop Build

04-05-2015, 11:48 AM	#8
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,449	Re: Which one is factory correct? Above the x-member for sure. Toss in a t-case skid plate while you are down there __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland

04-24-2015, 07:36 PM	#11
1rippen6 Senior Member Join Date: May 2011 Location: Greencastle PA Posts: 6,807	Re: Which one is factory correct? I know this is late and it appears you found you answer put thought I would had this for future questions Attached Images

04-24-2015, 09:57 PM	#13
1rippen6 Senior Member Join Date: May 2011 Location: Greencastle PA Posts: 6,807	Re: Which one is factory correct? Got it from here Attached Images

04-24-2015, 10:10 PM	#15
1rippen6 Senior Member Join Date: May 2011 Location: Greencastle PA Posts: 6,807	Re: Which one is factory correct? Really not a lot of pictures but picked it up on ebay for 45 plus shipping.



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