Nissan 370Z Forum - View Single Post - Question about the hiss/rattle after installing HFC's

Diversion · 07-12-2009, 01:26 PM

Mine hisses and has a metallic ringing sound on the rpm decels as well.. it's normal, I hear it on a lot of VQ37s with high flow cats. I'm not sure if the sound is there with test pipes though?

07-12-2009, 01:26 PM	#3 (permalink)
Diversion Enthusiast Member Join Date: Apr 2009 Location: Jacksonville, Florida Posts: 393 Drives: 09 370Z Silver/Persi Rep Power: 284	Mine hisses and has a metallic ringing sound on the rpm decels as well.. it's normal, I hear it on a lot of VQ37s with high flow cats. I'm not sure if the sound is there with test pipes though? __________________ 09 370Z Touring + Sport + Nav (Status Elite Intakes) (Berk HFCs) (Invidia Q300 CBE) (Nismo Swaybars) 99 Civic Si (Daily Driver, completely unmolested stock rarity)