Quote: My old setup with 3" TTi and Dynomax muffs added 70 pounds and the car went the same 11.11 to 11.14 every time. So I have never run open headers again.. Too much noise for no reason!
OLD SETUP 446 with 1050 dom. and .650 comp flat tappet. 906 heads.
And none of you re-jetted for the open headers so you gained nothing and figured it doesnt matter EDIT but the length of the exhaust might help in making torque because no one puts on a collector extension which the total collector length should be about 16"-18"