Quote:
Originally Posted by KingLT1
That is odd...the spring tension is really tight on my Flowmaster valves. Actually both exhausts were. Flowmaster sent me a replacement because the valves leak when closed creating a "hissing" sound. I thought the springs were too stiff not allowing the NPP actuator to close them. Sounds like perhaps Flowmaster reduced tension on the springs so the NPP actuators don't have to work as hard to close the valves, but then the springs rattle.
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Interesting, I didn't have a "hissing" problem, but I had a SIGNIFICANT rattle. The zip tie completely solved that for me, and I'm thrilled with the exhaust now.
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Current - 2018 Camaro 1SS with MRC, 1LE Suspension, NPP Exaust, 6 Speed.
Past -
2016 Ford Mustang GT Performance Pack
2015 Camaro SS
2010 Ford Mustang GT