1 7/8 Header to 3 inch review (Fit, sound and such).


Active Member
Jan 14, 2019
New Hampshire
Current setup is too small for my application. Was told by some in the car world a 1 7/8 or 2 to a 3 inch exhaust would be much better. Just wondering who has what and what seems to fit the best.

Worries are the steering shaft as I have a 427 stroker in it (351w block) and exhaust over the axle and tire clearance.

Thanks for the feedback and suggestions.
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Active Member
Jan 10, 2011
getting a 3" over the axle is no fun.

it'll go, but there is maybe a 1/4" between the pipe & frame, and pipe & uca. You'd be wise to put aftermarket uca's on it. Gives a little more clearance over the stock style.

1 7/8 header is no problem depending on the k member. 2" fits, it starts getting tight though. There is very little gain going from 1 3/4 to 1 7/8 unless you are over 800hp n/a. There IS a gain, but it's minimal; like 2-5 hp and all up top. There is a gain going from 2 1/2 to 3" exhaust, and most of that gain is up top too. And there is certainly a gain in noise and heat. It's hard to find reasonably quiet 3" mufflers.
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