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Berk hfc installed air surging or turbine sound?

I just recently had the FI exhaust with their HFC's installed and I have the same thing. If I let off the throttle around 4 or 5k when driving and

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		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Intake/Exhaust
Berk hfc installed air surging or turbine sound?

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12-20-2012, 04:38 PM	#4 (permalink)
Chemy Base Member Join Date: Aug 2012 Location: Atlanta, GA Posts: 109 Drives: Nismo 370Z, Pearl Rep Power: 13	I just recently had the FI exhaust with their HFC's installed and I have the same thing. If I let off the throttle around 4 or 5k when driving and just let the engine wind down, it will make the hiss noise all the way down to about 2500 maybe. It only does it on decel. It is the VQ motor and is normal. DEpointfive0 likes this. __________________ 2012 Nismo, PW #512. FI CBE SS w/12" Res, Stillen g3's, UpRev, Kenwood 9990HD, Focal speakers and tweeters, Wicked Cas corner box with JL 10" w6, 35% ceramic tint, full clear bra.

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