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02-26-2014, 08:58 AM
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#1 |
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Registered User
 
Join Date: Apr 2012
Location: Michigan
Posts: 389
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72 gmc jimmy dual exhaust
I finally got my new full length headers from hedman but now I'm wondering about running dual exhaust out the side of the quarters. I currently dump under the truck just past the rear axles. What I am wondering is do any of you guys know of a good header back kit that is easy to install? I do know how to weld but just need some help determining what kit I may need. (Ie what size tubing, proper bends so on and so forth)Headers have 3 inch collectors. Any help would be greatly appreciated.
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03-01-2014, 10:25 PM
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#2 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
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Re: 72 gmc jimmy dual exhaust
You could probably adapt a '73 and up exhaust and make it work with your welder and a sawzall, but I would suggest having a competent local exhaust company make you a custom exhauts. My recommendation would be to put the tail pipes at a 45 degree angle out the side. This maximizes flow. A 4x4 should never have them straight out the back, pack them full of mud and water if you are using your truck and have to rock it back and forth. I really like the Magnaflow Hemi Turbo mufflers for excellent power making flow and better than average noise reduction.
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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 |
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03-03-2014, 11:06 AM
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#3 |
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Registered User
Join Date: Sep 2013
Location: Bangor pa
Posts: 1,223
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Re: 72 gmc jimmy dual exhaust
Easiest way is to take it to a shop. Only cost me 300 to get Midas to put one on for me headers back. 45 degree out behind tires to keap Exhaust out of the cab.
__________________
72 3/4 ton blazer. 5 inch lift on 35 inch tires. 355 corvette engine with crane roller rockers, rv cam, edelbrock carb and intake with one inch spacer. Thrush Headers with flowmaster 40 duels. 4speed sm465 manual. 4 wheel disk brakes with Inboarded rear shock prerunner style mounts and shocks. |
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03-03-2014, 02:52 PM
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#4 |
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Registered User
Join Date: Apr 2012
Location: Michigan
Posts: 389
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Re: 72 gmc jimmy dual exhaust
Ok thanks for the input guys!
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03-04-2014, 05:15 AM
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#5 |
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Registered User
Join Date: Sep 2013
Location: Bangor pa
Posts: 1,223
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Re: 72 gmc jimmy dual exhaust
If you are wanting to do it yourself I've heard summit sells a decent DIY kit as well.
__________________
72 3/4 ton blazer. 5 inch lift on 35 inch tires. 355 corvette engine with crane roller rockers, rv cam, edelbrock carb and intake with one inch spacer. Thrush Headers with flowmaster 40 duels. 4speed sm465 manual. 4 wheel disk brakes with Inboarded rear shock prerunner style mounts and shocks. |
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03-04-2014, 12:21 PM
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#6 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,728
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Re: 72 gmc jimmy dual exhaust
Correction to my post: The DYNOMAX Hemi turbo mufflers not Magnaflow as stated above. I have a set of Magnaflows I got from a parts truck I'm going to put on my '69 short step so that crossed my wires.
__________________
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 |
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