Quote:
Originally Posted by 6spdhyperblue
Does it hiss at the low cfm at cruise or just when pushing a bunch of air through them?
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its only noticeable at idle with the exhaust valves closed(touring/stealth) when you stand behind the car, or backing into the garage with the windows down. Most probably leave the car in sport and never notice it, but since I have cat deletes, it makes the exhaust significantly louder. I had my valves programmed to stay closed in all modes until 3-4k rpm then open.