Exhaust Down Pipes ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

54blackhornet · 02-24-2020, 05:23 PM

I’ve decided to build my own dual exhaust because of the cost at my local shop. 350, LWB leaf-spring rear. Reviews talk about one down pipe not being correctly bent ? Can anyone confirm this or suggest a good set. I located this 2.5 Stainless 3 bolt flange. Appreciate any thoughts.

Andy4639 · 02-24-2020, 07:01 PM

I just had the local shop make me a set for the 68 step. He did it in about 2 hrs and charged me $100.00 for both. He welded them into the exhaust for me also. I can drop the starter without taking the passenger side loose I think. 2.5" pipe.
One guy wanted $250.00-$300.00!

**Vero67** · 02-24-2020, 11:44 PM

I used Heartthrob for the exhaust on my 67 K10. Due to the Rockwell transfercase the passenger side wouldn't work, which I knew. I mocked up what I needed with flexpipe, then had the local shop bend me a down pipe. $60

notsolo · 02-25-2020, 07:30 AM

LMC...Heartthrob kit for a LWB with leaf springs is $450 ...Emailed Hearthrob about the difference in the down pipe. Did not get a definitive answer, said the kit was only about a year old...I have seen it talked about here since 2015.? I bought a generic kit from Summit $150 delivered 2.25 pipes, no down pipes or mufflers. I don't think anybody makes the down pipes with adjusted angle on the rt side...Could be wrong...Maybe somebody will chime in with the answer.

54blackhornet · 02-25-2020, 11:59 AM

Thanks guy ! How can this be after all these years ? I guess they just don’t care ? Crazy !

Andy4639 · 02-25-2020, 05:42 PM

Here is some kits you may want to check out.

2.50" SS Stainless Steel SS409 Dual Exhaust Downpipe Kit System 67-72 Chevy/GMC C10/C15 1/2 Ton 2WD Pickup Truck. Fits Small Block V8 Angled Ram Horn...

https://www.amazon.com/Stainless-Exh.../dp/B07SG7CGGL

JEGS
https://www.jegs.com/i/Pypes+Perform...IaAgqJEALw_wcB

https://www.tunersports.com/magnaflo...80_p49182.html

54blackhornet · 02-25-2020, 06:54 PM

I already came across the first one you listed, both pipes have same angel .

Andy4639 · 02-25-2020, 10:03 PM

I'm not home are I would look at my 2 trucks and snap some pictures. I would think it wouldn't be that far off. If they say they fit 67/72 they surely had to install them at some point.

54blackhornet · 02-26-2020, 04:37 PM

I contacted Pypes today . They off 2.5 SS Down pipes that where recently modified to fit our trucks . Going to pull the trigger on a set from Jegs. $165.00 shipped. Will report back on fitment.

**DA71Grande** · 03-03-2020, 04:42 PM

I have some magnaflow down pipes that are for a c10 hopefully the will work for my c20 they do have some slight bends to them not sure how correct they are to fitting.

54blackhornet · 03-03-2020, 06:59 PM

Could you tell us where you got them and hw much ? 2 1/4 or 2 1/2 ?

**DA71Grande** · 03-03-2020, 07:47 PM

Quote:

Originally Posted by 54blackhornet

Could you tell us where you got them and hw much ? 2 1/4 or 2 1/2 ?

I got them from here https://www.hottexhaust.com/Magnaflow_15380 they also offer a 20% discount and free shipping so it was around $180.

Andy4639 · 03-03-2020, 09:01 PM

I put 64 Impala down pipes on the ramp truck. I had new exhaust installed on the 64 right after I bought it. I took the old exhaust and used it on the ramp. Friday morning it gets the stacks hooked up to it.

02-24-2020, 05:23 PM	#1
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Exhaust Down Pipes ? I’ve decided to build my own dual exhaust because of the cost at my local shop. 350, LWB leaf-spring rear. Reviews talk about one down pipe not being correctly bent ? Can anyone confirm this or suggest a good set. I located this 2.5 Stainless 3 bolt flange. Appreciate any thoughts. Attached Images __________________ 71 C-20 07 Magnum RT AWD

02-24-2020, 07:01 PM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Exhaust Down Pipes ? I just had the local shop make me a set for the 68 step. He did it in about 2 hrs and charged me $100.00 for both. He welded them into the exhaust for me also. I can drop the starter without taking the passenger side loose I think. 2.5" pipe. One guy wanted $250.00-$300.00! __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-24-2020, 11:44 PM	#3
Vero67 Senior Member Join Date: May 2013 Location: Vero Beach FL Posts: 298	Re: Exhaust Down Pipes ? I used Heartthrob for the exhaust on my 67 K10. Due to the Rockwell transfercase the passenger side wouldn't work, which I knew. I mocked up what I needed with flexpipe, then had the local shop bend me a down pipe. $60

02-25-2020, 07:30 AM	#4
notsolo Registered User Join Date: Apr 2008 Location: Md Posts: 2,482	Re: Exhaust Down Pipes ? LMC...Heartthrob kit for a LWB with leaf springs is $450 ...Emailed Hearthrob about the difference in the down pipe. Did not get a definitive answer, said the kit was only about a year old...I have seen it talked about here since 2015.? I bought a generic kit from Summit $150 delivered 2.25 pipes, no down pipes or mufflers. I don't think anybody makes the down pipes with adjusted angle on the rt side...Could be wrong...Maybe somebody will chime in with the answer. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=635605

02-25-2020, 11:59 AM	#5
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Re: Exhaust Down Pipes ? Thanks guy ! How can this be after all these years ? I guess they just don’t care ? Crazy ! __________________ 71 C-20 07 Magnum RT AWD

02-25-2020, 05:42 PM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Exhaust Down Pipes ? Here is some kits you may want to check out. 2.50" SS Stainless Steel SS409 Dual Exhaust Downpipe Kit System 67-72 Chevy/GMC C10/C15 1/2 Ton 2WD Pickup Truck. Fits Small Block V8 Angled Ram Horn... https://www.amazon.com/Stainless-Exh.../dp/B07SG7CGGL JEGS https://www.jegs.com/i/Pypes+Perform...IaAgqJEALw_wcB https://www.tunersports.com/magnaflo...80_p49182.html __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-25-2020, 06:54 PM	#7
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Re: Exhaust Down Pipes ? I already came across the first one you listed, both pipes have same angel . __________________ 71 C-20 07 Magnum RT AWD

02-25-2020, 10:03 PM	#8
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Exhaust Down Pipes ? I'm not home are I would look at my 2 trucks and snap some pictures. I would think it wouldn't be that far off. If they say they fit 67/72 they surely had to install them at some point. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-26-2020, 04:37 PM	#9
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Re: Exhaust Down Pipes ? I contacted Pypes today . They off 2.5 SS Down pipes that where recently modified to fit our trucks . Going to pull the trigger on a set from Jegs. $165.00 shipped. Will report back on fitment. __________________ 71 C-20 07 Magnum RT AWD

03-03-2020, 04:42 PM	#10
DA71Grande Senior Member Join Date: Aug 2018 Location: Liberty Twp, Ohio Posts: 346	Re: Exhaust Down Pipes ? I have some magnaflow down pipes that are for a c10 hopefully the will work for my c20 they do have some slight bends to them not sure how correct they are to fitting. Attached Images __________________ Doug 71 Sierra Grande C25 16 Sierra 2500HD All Terrain 23 Chevy Tahoe Z71 https://paypal.me/digdug7131?locale.x=en_US

03-03-2020, 06:59 PM	#11
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,393	Re: Exhaust Down Pipes ? Could you tell us where you got them and hw much ? 2 1/4 or 2 1/2 ? __________________ 71 C-20 07 Magnum RT AWD

03-03-2020, 09:01 PM	#13
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Exhaust Down Pipes ? I put 64 Impala down pipes on the ramp truck. I had new exhaust installed on the 64 right after I bought it. I took the old exhaust and used it on the ramp. Friday morning it gets the stacks hooked up to it. Attached Images __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

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