cat or no cat?

[5.9 R/T]

Originally posted by 4wheeldrift
The gain you noticed is from the catback and header, not removing the cat. The cat on most modern cars is hardly a restriction at all, and removing it only amounts to a horsepower or two at the wheels, at most.

cats do get plugged however, and you can see quite a large change in engine output by removing/replacing it on older cars.

[JustinL]

I'd say yank it. If it's clogged it will rob performance, just be prepared for a more "tinny" exhaust note. My car has a straight through 2.5" exhaust with two mufflers and is very quiet until upper RPM range. With no cats and a leaky BOV I was getting Bangs out the exhaust on hot upshifts. This shouldn't be a problem with na cars though.

Justin

[4wheeldrift]

Originally posted by 5.9 R/T


cats do get plugged however, and you can see quite a large change in engine output by removing/replacing it on older cars.

That's a different situation from just cutting it off for the hell of it though. If your cat is plugged you are going to notice a huge decrease in performance.

[88CRX]

and theres no way knowing other then riping it off..... right?

[Slow5Oh]

My car came stock with 4 cats on my midpipe and I bought an o/r pipe now I have no cats , it sounds way better now.

[GT2NV]

yeah kronyk on here took out his cat on his probe GT, hell of alot louder "supposed" to be a 5hp boost, but now his car is very loud and shoots flames

[B18C]

Originally posted by rice_eater


..... Now when you way out the prices $75+GST for a Catco or $40 tops for them to cut it out and weld in a pipe the choice for me is clear. Now that's my opinion from what i saw on my car... let's not beat what i say to death and help this guy out with his question instead

Exactly. So help the environment for $40 bucks and get a cat.

[Dirty_SOHC]

I like my test pipe=)

[CRXguy]

Cat-less rules!!!!

[kaput]

.

[88CRX]

i'm calling carline tomorow to make an appointment to get it cut out....... nuke the whales












by the way i was kidding.