Rasp (very common I know)

Chemy

Resonated test pipes sound like a great idea.
Will my exhaust be louder on the outside?? I don't really
Want it any louder. I would love to cut down on the drone
Too.

Thanks

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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.

Jordo!

I had a set of CNT resonated test pipes and there was zero hiss or rasp. Wasn't any louder, no drone.

EDIT: No louder compared to non-resonated TP's, but any TP's will be louder than HFC's or stock cats.

But... that was with Nismo S-tune Y pipe. I tried switching to OBX and it made an incredibly loud hiss -- went back to original Y pipe.

If you have the OEM Y pipe, resonated TP's may just do the trick.

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Enjoy it. Destroy it.

NickTurnon

Even resonated test pipes are loud with varied exhaust setups.
HFCs are probably your best choice. Less sound then Test pipes but you still get more HP over stock cats. & just a little less then test pipes.

Another option is to just add a set of resonators ($100) to get rid of your drone.

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2009 Brilliant Silver BASE 7AT | TEIN S-Tech Springs | K&N Drop Ins & z1 Maf Tubes | AAM S-Line Short Tails | 5% Tint | 20MM Spacers | Sport Spoiler NickTurnon's 370z Build

Chemy

When I got my HFC's, I got non resonated ones. I'm wondering if resonated HFCs would be much better at rasp or drone? I think it would some but not much or enough.

How would I add resonators? Muffler shop or something? I really don't want to cut the exhaust at all.

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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.

NickTurnon

You can order resonators online or just go to a decent shop to get them welded on your existing exhaust. It would make it more of a custom build but the resonators are only about 1 foot or 1 & 1/2.

But thats if you really want to get rid of the drone. If you decide that it still is bothering you, you might want to consider just some GTM Mat or something to insulate the inside of the car better. It works wonders...

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2009 Brilliant Silver BASE 7AT | TEIN S-Tech Springs | K&N Drop Ins & z1 Maf Tubes | AAM S-Line Short Tails | 5% Tint | 20MM Spacers | Sport Spoiler NickTurnon's 370z Build

1cleanZ

Yes 100% test pipes will be louder over HFCs, but you'll also gain a few HP. FI HFCs you have everything running through a 300 cell cat...where with a test pipe, its running straiiiiight through. There's nothing resisting it at all.

Resonators have nothing to do with performance, only sound. They won't take away HP, but will help avoid rasp and drone.

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