Picture of factory tail pipe exit on 71ish SWB anyone?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**71CHEVYSHORTBED402** · 10-31-2022, 06:19 PM

My exhaust guy would like a reference. Don't suppose it matters LWB and SWB. I'm working on a 71 SWB, 402. The pipes exit the rear sides someplace.

A picture and three measurements appreciated a lot.......

.Horizonal distance from the rear fender to tail pipe's exterior:

.Vertical distance from the rear body's bottom to tail pipe's exterior:

.Inward or outward distance from the body's bottom to tail pipe's tip:

72SB · 10-31-2022, 06:26 PM

V8 or 6cyl?

**71CHEVYSHORTBED402** · 10-31-2022, 07:46 PM

Quote:

Originally Posted by 72sb

v8 or 6cyl?

402

mr.mud1 · 10-31-2022, 11:36 PM

hi Tony,i can get you some measurements tomorrow if you like.here's the new Waldron tailpipes on my 72 truck.they are the same as the originals i took off except 2 1/4 diameter pipe rather than 2 inch because i asked for them that way.everything fit right back on the factory hangers also.

**71CHEVYSHORTBED402** · 11-01-2022, 01:30 AM

Quote:

Originally Posted by mr.mud1

hi Tony,i can get you some measurements tomorrow if you like.here's the new Waldron tailpipes on my 72 truck.they are the same as the originals i took off except 2 1/4 diameter pipe rather than 2 inch because i asked for them that way.everything fit right back on the factory hangers also.

Thanks again Greg, I'd appreciate that.

mr.mud1 · 11-01-2022, 10:51 AM

Quote:

Originally Posted by 71CHEVYSHORTBED402

Thanks again Greg, I'd appreciate that.

hi Tony.i emailed some pictures to you this morning.if these aren't good enough or you need more,just holler.
Greg

72SB · 11-01-2022, 10:52 AM

The V8 pipe exit appears to be same position as 6, which is what I have. Since Greg is sending you his measurements I will hold off. Also I used stock hangers but 2" pipe and had the shop just weld on a chrome turn down tip positioned where "I" wanted it in terms of how far in/out I wanted it so it may not be exactly stock position

**71CHEVYSHORTBED402** · 11-01-2022, 12:40 PM

Thanks for all the help, and I appreciate it again Greg, you've helped me out a lot.

mr.mud1 · 11-01-2022, 04:51 PM

Quote:

Originally Posted by 71CHEVYSHORTBED402

Thanks for all the help, and I appreciate it again Greg, you've helped me out a lot.

not a problem sir,holler anytime.take care.Greg

**68 C10 Driver** · 11-02-2022, 04:20 PM

Maybe a dumb question, but did they do a single exhaust output for the SBC in these trucks? I know that was common in the sedans of that era, but unsure about the trucks.

Thanks!

mr.mud1 · 11-02-2022, 05:30 PM

Quote:

Originally Posted by 68 C10 Driver

Maybe a dumb question, but did they do a single exhaust output for the SBC in these trucks? I know that was common in the sedans of that era, but unsure about the trucks.

Thanks!

not a dumb question at all.they certainly did do single exhaust for these trucks with a small block.they all didn't have duals.i worked in a muffler shop when i was a kid so i saw lots of them.recently when i did the exhaust on my truck,i contacted Walker but the answer i got back was that they no longer made the parts for our trucks.i've used Waldron's in Michigan for exhaust parts for several projects now,they still show a single exhaust system for these trucks.all the best.Greg.

**Steeveedee** · 11-02-2022, 10:01 PM

I've seen it mentioned here somewhere that trucks with small block engines only ever had single exhaust with a y-pipe. I worked on a ton of vehicles from '70 to '72, and only recall a very few dual exhaust vehicles, but no SBC trucks, and I can count on one finger a SBC 400 with dual exhaust, in an Impala. Rare bird, I guess. BBC trucks were always dual exhaust in those years, IIRC.

72SB · 11-03-2022, 02:06 PM

LMC sells a single exhaust for a 6 Cyl. Box with muffler that came with mine said Made in Michigan IIRC....don't know if it was Waldrons but system fit was good

**71CHEVYSHORTBED402** · 11-03-2022, 10:22 PM

Exhaust installed, great guy & work. 2.5" fronts and 2.25" rear. Turbo mufflers, they're pretty quiet when not broken

https://www.youtube.com/watch?v=hhM_Mg8MHGA&t=136s

mr.mud1 · 11-04-2022, 12:26 AM

Quote:

Originally Posted by 71CHEVYSHORTBED402

Exhaust installed, great guy & work. 2.5" fronts and 2.25" rear. Turbo mufflers, they're pretty quiet when not broken

https://www.youtube.com/watch?v=hhM_Mg8MHGA&t=136s

looking good.

slikside · 11-06-2022, 11:10 PM

Quote:

Originally Posted by 68 C10 Driver

Maybe a dumb question, but did they do a single exhaust output for the SBC in these trucks? I know that was common in the sedans of that era, but unsure about the trucks.

Thanks!

Sure did. Mine is a 350 with a Y pipe and single tail pipe that exits just aft of the left rear.

10-31-2022, 06:19 PM	#1
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,114	Picture of factory tail pipe exit on 71ish SWB 402 anyone?? My exhaust guy would like a reference. Don't suppose it matters LWB and SWB. I'm working on a 71 SWB, 402. The pipes exit the rear sides someplace. A picture and three measurements appreciated a lot....... .Horizonal distance from the rear fender to tail pipe's exterior: .Vertical distance from the rear body's bottom to tail pipe's exterior: .Inward or outward distance from the body's bottom to tail pipe's tip: __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-31-2022 at 09:44 PM. Reason: Clarification

10-31-2022, 06:26 PM	#2
72SB Registered User Join Date: Apr 2022 Location: Moorpark, CA Posts: 696	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? V8 or 6cyl?

10-31-2022, 11:36 PM	#4
mr.mud1 Registered User Join Date: Dec 2020 Location: Joggins Nova Scotia Posts: 1,592	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? hi Tony,i can get you some measurements tomorrow if you like.here's the new Waldron tailpipes on my 72 truck.they are the same as the originals i took off except 2 1/4 diameter pipe rather than 2 inch because i asked for them that way.everything fit right back on the factory hangers also. Attached Images

11-01-2022, 10:52 AM	#7
72SB Registered User Join Date: Apr 2022 Location: Moorpark, CA Posts: 696	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? The V8 pipe exit appears to be same position as 6, which is what I have. Since Greg is sending you his measurements I will hold off. Also I used stock hangers but 2" pipe and had the shop just weld on a chrome turn down tip positioned where "I" wanted it in terms of how far in/out I wanted it so it may not be exactly stock position

11-01-2022, 12:40 PM	#8
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,114	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? Thanks for all the help, and I appreciate it again Greg, you've helped me out a lot. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025

11-02-2022, 04:20 PM	#10
68 C10 Driver Senior Member Join Date: Oct 2020 Location: Kathleen, GA Posts: 618	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? Maybe a dumb question, but did they do a single exhaust output for the SBC in these trucks? I know that was common in the sedans of that era, but unsure about the trucks. Thanks!

11-02-2022, 10:01 PM	#12
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,080	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? I've seen it mentioned here somewhere that trucks with small block engines only ever had single exhaust with a y-pipe. I worked on a ton of vehicles from '70 to '72, and only recall a very few dual exhaust vehicles, but no SBC trucks, and I can count on one finger a SBC 400 with dual exhaust, in an Impala. Rare bird, I guess. BBC trucks were always dual exhaust in those years, IIRC. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

11-03-2022, 02:06 PM	#13
72SB Registered User Join Date: Apr 2022 Location: Moorpark, CA Posts: 696	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? LMC sells a single exhaust for a 6 Cyl. Box with muffler that came with mine said Made in Michigan IIRC....don't know if it was Waldrons but system fit was good

11-03-2022, 10:22 PM	#14
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,114	Re: Picture of factory tail pipe exit on 71ish SWB anyone?? Exhaust installed, great guy & work. 2.5" fronts and 2.25" rear. Turbo mufflers, they're pretty quiet when not broken https://www.youtube.com/watch?v=hhM_Mg8MHGA&t=136s Attached Images __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 11-03-2022 at 10:33 PM.

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