Z1 Motorsports HFC?

370Z Purist

I don't know if it applies anymore but I'm sure you've heard of the "hiss" that anything besides the OE cats produces. You probably won't get it as badly with HFC's versus (un)resonated test pipes.

Generally speaking, test pipes have shown gains roughly around 5-8 horsepower and 5-7 torques (or perhaps more torques...). HFC's should probably make just slightly less.

__________________
-Phil

"Since one of my brake light bulbs just went out, the forum told me that my piston rings are about to blow."

nmjaxx9

Yes i know about the hiss, which I heard is more with the test pipes. But really less than 5-8? Thought it would be more, like 12-14 range, thats what I have heard most of these give, anyways thanks for the input.

Alstann

I think if you do HFC/TP as the first breather mod, it does indeed give that much wheel horsepower. Doing them after Intakes or Exhaust will give less - they don't add together like a linear equation.

__________________

nmjaxx9

Is that right? Never knew, anyways Im sure freeing up the cats will still give me a performance bump, so I think Ill still go with it. I never thought of cats back when I was doing intake and exhaust, but since now my current setup is boring me I need to change it up!

370Z Purist

You will always feel gains with a cat-replacement, whether it be HFCs or test pipes. You don't need to go to a dyno for you to feel your *** get just a bit more planted into your seat.

10+ horsepower? Definitely if test pipes are your only change.

__________________
-Phil

"Since one of my brake light bulbs just went out, the forum told me that my piston rings are about to blow."