ArcticZ28

iTrader: (14)

Just wondering if anyone putting out 500+ rwhp is going through a high flow catted y like I'm going to be running. I just think it's gonna be pretty hard getting into the low 500's for me while still being able to pass emissions (cats + not able to dump the exhaust + no cutouts for visual inspection) and was wondering if anyone else has done it in a car that is a REAL daily driver.

kumar75150

u should be able to get it done with enough cubic inches

might be tough with a 408

ArcticZ28

iTrader: (14)

Well, that's the goal...

WS6 #3392

I have the FLP's and I switch out the cats to the ory when I go to get it tested. This is what I will do when I get back and push my ride to over 500 hp also. Just my .02

John35thSS

Dynoed new combo last week and made 656 rwhp 580 torque through 2 carsound cats mufflex 4 inch exhaust. So it can be done.

John

ArcticZ28

iTrader: (14)

Niiice numbers through cats. I'm gonna be N/A though, no power adders.

John35thSS

Going to be tough to pass emissions NA, need too much overlap to make that much power.
It was bad enough getting mine to pass with a XE 224 236 in a 396. A power adder is almost a necessity to make power and be emissions legal.

Almost a mute point here as anything newer than 1998 has to be plugged in to mto computer so they can check tune mileage etc when they do e test, am I ever glad I built a 1996 and left the 2002 stock.

John

ArcticZ28

iTrader: (14)

Yea, well as soon as I fail I'm gonna go the $500 waiver route. They're gonna tell me I need to redo a lot of things in the exhaust, put the egr back in, etc etc. It will certainly cost more than $500 and I'll "get it fixed" at a shop and have them write me a waiver

Louie83

iTrader: (3)

When PatrickG took the CATS off of his set-up just to test it, he said he only gained a couple of HP.

ArcticZ28

iTrader: (14)

His setup is a bit more tame than mine, with the main difference of him still being stock cubes. I'm pretty sure I'll lose a decent amount through cats. It will most likely be negligible on the street though, assuming I hit at least high 400's rwhp.

Snapps

iTrader: (39)

I did it with TSP Catted Y pipe. And I hit 500rwhp

ArcticZ28

iTrader: (14)

Good to know.