shawnberry45

iTrader: (5)

anyone have any experience with these? rasp?

Z1 370Z / G37 High Flow Metallic Catalytic Converters

beattyG37

I have a 2009 G37 Coupe S, and just had Z1 Motorsports install a Stillen Catback exhaust with the Z1 High Flow Cats. I already had the Stillen Gen 3 intakes installed previously. My goal was to gain some power but NOT have a loud exhaust. I have not noticed any "rasp" with my set-up. The HFC's certainly make the system louder but nothing outrageous, and certainly not as loud as test pipes.

shawnberry45

iTrader: (5)

noticable gain? how are these compared to like a berks etc... seems like a great price for them!

G37Sam

Honestly, if you're going to go through the headache just get resonated test pipes

shawnberry45

iTrader: (5)

in Chi, so gotta have cats..

anyone comment on these? seem priced very well! surprised they arent more popular! like over a hundred cheaper than berks...

surfwagon

iTrader: (1)

I'm also curious to hear what people think of these. Who has these?

RonMJ

Are they resonated? maybe that's why they are cheaper.

surfwagon

iTrader: (1)

Z1 are not resonated. Berk isn't resonated either and they are $500 vs. Z1 at $375. I had a Z1 products on my Z32 and was happy. I'm not sure why more people aren't sing the Z1 HFC. I want to figure this out before I buy them.