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john_engel's avatar
john_engel
Explorer
Jul 14, 2016

Header Installation - Abandon EGR Tube? - Acetone?

Hello all, I just installed a set of Thorley headers on a Chevy 454 7.4L to fix leaky stock manifolds, great solution! Performance is awesome!! My only issue is that the new headers don't have ...
Class A
llr's avatar
llr
Explorer
Jul 14, 2016
i suspect the acetone is to clean the fuel system which would help. not sure if I would try it but if you trust the shop try it.

I added headers and free flow intake to a 1977 class C many years ago, performance increased and mileage went up by 1.5MPG which was even better

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