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74 Buick 455 RAT emissions problems
Posted to R.P.M. Forum on 1/15/2008 31 Replies

I've got one heck of a problem. I built this thing so I'm stuck with it. 455 Buick, BIG cam, high rise intake, 870 CFM Holley, sewer pipe exhaust. Will not pass emissions. Suprised? I'm not. But I have to get it through legal.

Here are the numbers: 2500 RPM ... Login to read more.

31 Replies Received (View Replies)