Thread: Just received the new Ark Type 2 Grip True Dual exhaust
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Old 06-14-2010, 09:38 AM   #52 (permalink)
Daishi
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Quote:
Originally Posted by m4a1mustang View Post
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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