EightTrack

Ok My friend's trying to get me to gut my main cat. I have an 88 N/A so I understand that the 5/6 th ports are opened by backpressure but shouldnt the 2 precats provide plenty to still open them?

Also, how bad do sound levels get when the main cat it gutted? I'm running a custom 2.5" catback with Apexi N1 can.

this won't be permanant, as I'll be putting on a header and presilencer at a later date..

stock7

I'vbe got an 89 GTU, and I just gutted the cats, it was severly clogged, the second pre cat had been pushed back into the main cat... It didn't sound bad, and It added a little HP. With my 89 the 5th and 6th port acuator is attached to the cat, and it seemed to run just fine gutted out, however I am now switching to the full RB set up header, pre-silencer and cat back. I hope it sounds good

EightTrack

Well I said F**k it and did it.

Results:
-Exhaust note is slightly deeper, slightly louder
-5/6 ports still functioning.
-Call me crazy but I swear I can chirp 2nd way easier.
-mmmmm.... gas smell....

DAN CARWIN

have fun with emmisions now..........................

1987RX7guy

iTrader: (3)

emmissions are for californian politics
Let her stink man.

casio

gutted cats are so ghetto. if the car runs, drive it until you can afford an exhaust system. i have a header back system i paid a total of $330 for. RB uncollected header - custom pipe - RP catback. i bought it all used and saved a lot.

DAN CARWIN

"emmissions are for californian politics
Let her stink man. " Yes I know but when you have to go register yor car again.

Pinfield357

i was gonna put ina test pipe but now im deciding to just get a down pipe (its a 87 TII) and gut the main cat cause i still need to pass a visual inspection

1987RX7guy

iTrader: (3)

I re-registered just fine here in south texas. It all depends on the local laws. But california is the main state that I know of that is STRICT on emmissions.

EightTrack

Let me tell you folks about a little place called canada..... no emmissions here

Aaron Cake

iTrader: (1)

Ontario has emissions, as to many other areas.