XtinctZ28

iTrader: (57)

I have the Corsa catback, will be running Kooks longtubes, and I need to know the performance, and sound differences between an ORY and a Catted Y for this combination.

Search results show hundreds of comments on cats or no cats, but I want info on this setup specifically.

I know some people say they get a rasp without the cats, but since the Corsa sounds so deep and hollow already does this still apply?

Thanks for any info.

ynkssws6

iTrader: (1)

I've heard kooks to a corsa at the track and it sounded really good, screamed at WOT. Unfortunately, i can't remember if it had cats or not.

2001 Pewter WS6

iTrader: (43)

I had that setup and it will rasp. I think thesound is more refined with cats on it. I even trued a bullet in the I pipe with out cats and still sounded bad.

EVIL TA

iTrader: (3)

i've heard it without cats its rasy's. but damn it sounds mean as hell.

Ryan02SS

iTrader: (3)

I've ran it both ways and like having highflow cats much much better! The ORY only sounded better at WOT. From 2200-2800 it rasped pretty badly with the ORY. Adding the cats totally cleaned up the sound and makes it a joy to drive. Very deep and very Corsa sounding. I lost about 10rwhp and equal torque cam only after adding the Magnaflow High flow cats over the ORY. On my current setup I have no idea how much they are holding me back.

XtinctZ28

iTrader: (57)

Thanks for the input. Does anyone have any vids or sounds of their setups?

LS1sounds has a couple of decent sound clips but the best one is just at idle with a fat cam.

elite22xl

iTrader: (1)

i remember that car. it had cats, and a cam too, so sound changed a little.

i had corsa with qtps with cats and without. i liked the sound without cats. but had a better tone with the cats. best of both worlds was the cats with a cutout in the i pipe.