6th Gen ('00-'05): 3.8 Headers / Exhaust Fitment on 3.4 ??

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Feb 28, 2015 | 12:43 PM

Bkoso85

Thread Starter

Joined: Feb 2015

Posts: 2

3.8 Headers / Exhaust Fitment on 3.4 ??

My question is this. Will 3.8 aftermarket headers / crossover pipe / downpipe fit on my 3.4 LS Monte? I have found headers for the 3.8 that are MUCH cheaper than headers for the 3.4. Sorry for the newb question lol

Feb 28, 2015 | 12:48 PM

The_Maniac

Monte Of The Month -- December 2011
Monte Of The Month -- September 2014

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Joined: Apr 2010

Posts: 12,605

From: Mentor, Ohio

3800 and 3400 parts are not interchangeable. The geometry of the exhaust parts are all different.

You might be better off getting headers for a 3400 powered grand am and have an exhaust shop rework them to connect to a wbody down pipe.

Mar 14, 2015 | 03:45 AM

Cocky Colin

Joined: Mar 2015

Posts: 15

The Maniac is right there not interchangeable. There 2 different engine families. The 3.8 is acutely a Buick designed engine that has its roots from back in the 60's and the 3.4 is a true Chevrolet engine