Quote:
Originally Posted by LOU@AMPLIFIED
That hiss is common once you have any HFC/TEST PIPE, that only occurs on deceleration. So far, all of the HFC and TEST PIPES we've installed has that mysterious HISS
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Lou i installed FI test pipes on my car and i have the FI catback with no resonators. I hear the hiss in the cabbin even at full throttle lol. ive never heard that on any of the cars ive had except when there was an exhaust leak but i dont feel any leaks when i put my hand up to the exhaust.