i have a 1989 chevy suburban 4x4 with a 350 throttle body injection im currently fixing the head gaskets and noticed my exhaust manifold is cracked badly i had them to begin with and was wondering if i can get away with slapping some affordable headers on there to boost HP and still pass smog ? i had a Trans Am with a 6.6 with hooker headers and passed smog no problem but that car had a smog pump the newer truck doesnt
as long as you can find a carb number for the headers, you should be ok. as long as you are running every thing else that is listed on the emission sticker including the o2 sensor(s).
a trans am with a 400, but ill bet that it was form the 70s, low compression and low power output.mine passed smog with lower output than a honda, but it supports 375 horses.
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