Want to put in a 2 piece header (70MM) and an a like high flow catalytic converter in my 07 Civic SI.
If I replace the stock manifold with a non racing header an replace the stock catalytic converter with a high flow catalytic converter to match my 70MM cat back exhaust an still pass emissions?
i live in MA an have same restrictions as CA. I know a RACE HEADER HAS NO CAT so that wont work. And since the catalytic converter will be in along with the sensors will i pass?
it should work...the header really doesn't change the burnt fuel mix if the o2 sensor is working.. but messing with air intake,,,exhaust and a chip its hard to keep everything balanced...too damn many sensors...you might want to try and find a "tuner" shop...some one who knows the ins and outs of honda computers..
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