Exhaust question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Orefactory4x4 swb** · 01-23-2025, 08:12 PM

Getting close to doing the exhaust on my 72 k10. And wanting some advise
350 /th350 and wondering about headers . What’s the best fit so I order them right first time around.

**70STOVEBOLT** · 01-24-2025, 11:50 AM

Are you tucking the exhaust up inside the frame rails? If so, order a set of headers for a 68-72 Chevelle. They are full length, but don't extend down below the frame rails like the truck headers do. If not tucking it up, the headers for your truck application should work. As far as tube diameter, that depends on the engine. If it's stock, 1 5/8 will work fine. If it's a little hotter, go with 1 3/4 or larger, depending on how hot it is.

**Sheepdip** · 01-24-2025, 06:37 PM

My personal taste is to add an "H" pipe for best blended sound and exit out the side or back, dumping underneath the truck will rattle your brains out, not to mention every time you get off the pavement or on dirty pavement you will look like a helicopter landing.

Just my .02 worth.

**Orefactory4x4 swb** · Yesterday, 03:09 PM

Thanks to you both for your time and information.
There’s so many ways to go it gets confusing on what to order.

Mike C · Yesterday, 10:20 PM

The 4 wheel drive truck headers don’t extend below the frame. The exhaust is routed over the transmission crossmember in the 4x4 unlike the 2 wheel drive that drops below. The two wheel drive headers will usually interfere with the front driveshaft if installed in a 4x4.

My own experience with headers and 4x4 was in my Jimmy. Headman was the 3rd set I tried and the only that would clear the OEM mechanical clutch linkage.

No issues with the Headman’s, but I elected to go with the Corvette 2 1/2” manifolds and unless you are looking to make hot rod power versus truck power, would recommend the same to you.

**Already Gone** · Today, 01:41 AM

Curious as to why you want headers unless u have a 600HP motor ? The factory rams head manifolds flow 90 % as good as headers for most applications.

**kwmech** · Today, 12:57 PM

^^^what he said

**Orefactory4x4 swb** · Today, 03:22 PM

Just wanting to go the right direction to clear shift linkage and other issues that might come up. Seems like most guys went the heated direction so that got me thing that. But I’m thinking I’ll go like mike said and go the corvette 2 1/2.
The stock original ones are still on the motor I pulled. What are they compared to the 2 1/2. They dump straight down and not out the back like I’m seeing in some online

01-23-2025, 08:12 PM	#1
Orefactory4x4 swb Active Member Join Date: Mar 2023 Location: Springfield oregon Posts: 196	Exhaust question Getting close to doing the exhaust on my 72 k10. And wanting some advise 350 /th350 and wondering about headers . What’s the best fit so I order them right first time around.

01-24-2025, 11:50 AM	#2
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,468	Re: Exhaust question Are you tucking the exhaust up inside the frame rails? If so, order a set of headers for a 68-72 Chevelle. They are full length, but don't extend down below the frame rails like the truck headers do. If not tucking it up, the headers for your truck application should work. As far as tube diameter, that depends on the engine. If it's stock, 1 5/8 will work fine. If it's a little hotter, go with 1 3/4 or larger, depending on how hot it is. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

01-24-2025, 06:37 PM	#3
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,655	Re: Exhaust question My personal taste is to add an "H" pipe for best blended sound and exit out the side or back, dumping underneath the truck will rattle your brains out, not to mention every time you get off the pavement or on dirty pavement you will look like a helicopter landing. Just my .02 worth.

Yesterday, 03:09 PM	#4
Orefactory4x4 swb Active Member Join Date: Mar 2023 Location: Springfield oregon Posts: 196	Re: Exhaust question Thanks to you both for your time and information. There’s so many ways to go it gets confusing on what to order.

Yesterday, 10:20 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,731	Re: Exhaust question The 4 wheel drive truck headers don’t extend below the frame. The exhaust is routed over the transmission crossmember in the 4x4 unlike the 2 wheel drive that drops below. The two wheel drive headers will usually interfere with the front driveshaft if installed in a 4x4. My own experience with headers and 4x4 was in my Jimmy. Headman was the 3rd set I tried and the only that would clear the OEM mechanical clutch linkage. No issues with the Headman’s, but I elected to go with the Corvette 2 1/2” manifolds and unless you are looking to make hot rod power versus truck power, would recommend the same to you. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

Today, 01:41 AM	#6
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,150	Re: Exhaust question Curious as to why you want headers unless u have a 600HP motor ? The factory rams head manifolds flow 90 % as good as headers for most applications. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

Today, 12:57 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,679	Re: Exhaust question ^^^what he said

Today, 03:22 PM	#8
Orefactory4x4 swb Active Member Join Date: Mar 2023 Location: Springfield oregon Posts: 196	Re: Exhaust question Just wanting to go the right direction to clear shift linkage and other issues that might come up. Seems like most guys went the heated direction so that got me thing that. But I’m thinking I’ll go like mike said and go the corvette 2 1/2. The stock original ones are still on the motor I pulled. What are they compared to the 2 1/2. They dump straight down and not out the back like I’m seeing in some online



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