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high flow cats and test pipes make a noticeable, hiss-like sound when the throttle is allowed to drop. from what I've read, they make the sound at certain RPMs also.
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06-28-2012, 03:30 PM
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A True Z Fanatic
Join Date: Jun 2009
Location: Zion, Illinois
Posts: 1,873
Drives: '09 370Z-T BS M6
Rep Power: 21   |
high flow cats and test pipes make a noticeable, hiss-like sound when the throttle is allowed to drop. from what I've read, they make the sound at certain RPMs also. the video sounds completely normal to me.
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