Chris06CobaltSS

Don't really know if this is the place to post this, but would anyone be interested in trading their 2.5 inch down pipe and exhaust for my 3 inch? Looking for zzp. I have a 3 inch zzp catted dp with extra o2 bung and a 3 inch magnaflow catback! Let me know

Bluelightning

iTrader: (8)

Why would you want to choke out your exhaust with a 2.5" downpipe? That magnaflow is probably loud as hell lol. But if that's your issue just get a different catback.

Haven07

Put a vibrant ultra quiet resonator and borla exhaust on your car, it'll be quiet at idle/cruise but roar to life at WOT.


I'm catless with long tubes now and my friends say it's quieter than when I had my catted zzp 2.5 inch

Chris06CobaltSS

I'm having pressure issues with a 3 inch. The 2.5 inch will most likely fix this, the 3 inch is too much for my supercharger

Bluelightning

iTrader: (8)

Lol negative

Explain the pressure issues you are having.

calo247

please don't say that your getting less boost with the 3 inch exhaust .........

Studer

Lol

Staged07SS

iTrader: (25)

Ummmmm no.

Must think that less boost means less HP.

Viperoni

Do 3" catback's show any gains over a 2.5 on an M62?

Staged07SS

iTrader: (25)

No. 2.5" is more than sufficient.

The downpipe should be 3" though for max flow.

Hell, 100%meth just made over 420whp with his TVS car using a 2.25" Borla catback (same as gmpp catback).

Viperoni

Fair enough, really a 2.5" pipe supports 232hp while a 2.75" pipe supports 283hp, so if anything you'd only lose a bit off the top end:

http://www.ls1gto.com/forums/attachm...1&d=1332948156

Staged07SS

iTrader: (25)

Yup.

My setup is 3" to 2.5" catless downpipe to 2.5" corsa catback.

Proven to supports 300+ whp.