Thread: Can i just strait pipe?

Originally Posted by hockeybawler

So then if you get a hi-flow cat would that then effect your gas mileage? or no because you still have a cat on there?

Most if not all highflow cats will still set the SES off because it flows too well.

Originally Posted by Iceman6669

Isnt that what the rear O2 sim does, it simulates a working cat so the car diagnostics works... 97-00 dont need the sim just have an SES light till it gets tuned out. 01+ have Cat Diagnostics and NEED the O2 sim to go catless or else yes the computer dumps fuel.

They say that 01-03 can use the sim, but it doesnt always work, and 04+ cant use a sim, because it wont work at all.

OP's car is 04.

Originally Posted by Fivefingerdeathpunch

Most if not all highflow cats will still set the SES off because it flows too well.



They say that 01-03 can use the sim, but it doesnt always work, and 04+ cant use a sim, because it wont work at all.

OP's car is 04.

I didn't know that it only works on 01-03 cars... I assumed all cars that have the Cat Diagnostics it would work on.