What type of high flow cat catalytic converter, cell count, ceramic vs metallic

[bobkatkat]

Obviously your cat back is custom, but what is your setup? What was your speed?

that was for the 150 club so it was not really an issue for the car. This year was rained out so no chance really run it.

X2, I like your sound, but sounds like the cops hear you a mile away lol. What do you have for cat back?

3" to 2.5" downpipes, magnaflow 2.5 inch 200 cell metal cats, dual 2.5 inch through 2 in 2 out resonator and custom rear section out the big twin ovals.
I think cops can hear all stage 3 or + from a mile away.

[Regal to S4]

3" downpipes, magnaflow 2.5 inch 200 cell metal cats, dual 2.5 inch through 2 in 2 out resonator and custom rear section out the big twin ovals.
I think cops can hear all stage 3 or + from a mile away.

I'll be running the full 3" downpipes for the tiptronic, why 2.5 instead of 3 inch cats when you have 3 inch downpipes? Better velocity at your mods?

[bobkatkat]

I'll be running the full 3" downpipes for the tiptronic, why 2.5 instead of 3 inch cats when you have 3 inch downpipes? Better velocity at your mods?

Sorry I edited my post. My downpipes are the original AWE 3" tapering to 2.5".