zmaster Posted May 2, 2008 Share Posted May 2, 2008 What is the largest outlet diamter on a performance header on a 75 280z L28 engine? I want to put a full 3 inch exhaust and i want themost flow I can possibly get all the way through my exhaust. What does everyone else use on there 3 inch and larger exhaust setups???? And I am sorry if this is a repost, but I could not find any useful info on this subject matter. Thanks, Thomas Quote Link to comment Share on other sites More sharing options...
Challenger Posted May 2, 2008 Share Posted May 2, 2008 Full 3 inch exhaust might not help the motor. From what I know the stock ecu cant handle to much change in backpressure. Bigger isnt always better. Quote Link to comment Share on other sites More sharing options...
zmaster Posted May 2, 2008 Author Share Posted May 2, 2008 i think the stock exhaust is about 2.50 inches, so i really don't think a half on an inch to 3/4 of an inch should really cause that much back pressure drop? What would you suggest to use then, because i was planning on modifying the stock motor with a cam, aluminum flywheel, it already has a cold air intake on it in front of the radiator. By the way,What is done to your car for the mechanical, and exhaust? Quote Link to comment Share on other sites More sharing options...
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