5th and 6th ports

06-24-2003, 08:26 PM
ive been told that the 85-88 7s have their 5th and 6th ports open off of backpressure in the exaust. i found out that 89-92 open off of a water pump or something like that but i cant find the website that i found this info on. i put straits on my 7 but now i have no backpressure and the ports dont open (im assuming) does anyone know how to fix this.

ymb honk
07-04-2003, 03:01 PM
get rid of the straights

07-13-2003, 10:28 PM

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