Just received the new Ark Type 2 Grip True Dual exhaust

m4a1mustang · 06-14-2010, 07:28 AM

Quote:

Originally Posted by Daishi

Personaly I hate the hiss.. I'm 99% sure it comes from the xpipe. I've sat user the car while someone revved it and most of the rasp/hiss comes directly fr the xpipe you can clearly hear it.. I'd like to switch exhausts and test thigs out but that becomes expensive and I have no guarantees that it will be any different.

You are 99% sure and 100% correct.

The hiss DOES come from the X-pipe. Even my FI 18" CBE with STOCK cats has a little hiss. HFCs or test pipes only amplify the effect because they allow for higher airflow into the X pipe. The only exhausts that DON'T hiss are ones without a crossover pipe.

Toohip and ZCarMan both run the AAM Competition CBE (version 1) with HFCs and there is ZERO hiss.

Daishi · 06-14-2010, 08:38 AM

Quote:

Originally Posted by m4a1mustang

You are 99% sure and 100% correct.

The hiss DOES come from the X-pipe. Even my FI 18" CBE with STOCK cats has a little hiss. HFCs or test pipes only amplify the effect because they allow for higher airflow into the X pipe. The only exhausts that DON'T hiss are ones without a crossover pipe.

Toohip and ZCarMan both run the AAM Competition CBE (version 1) with HFCs and there is ZERO hiss.

What about exhausts with an H pipe like the HKS

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