Opinion

[combatmedic]

Just wondering what your guys opinion on running a cat or running a test pipe?

 

[Dhan]

Are you talking a high flow, hollowed out or stock cat? Why are you asking? Because it may make little to no difference depending on what kind of power you are making.

 

[2GbTalonGuy]

I'm running a cat-delete DP.

 

[RadDsm]

Only run a cat if you have to.

 

[bradikus7]

Only run a cat if you have to.

I agree. With these cars, you want the flow. As long as it's not a legal issue where you live, I say no cat aswell.

 

[Dhan]

OP: you don't have emissions testing required in your county, so you don't need a cat. If you use just a test pipe, make sure the pipe diameter remains constant, or it will do more harm than good.

 

[combatmedic]

just curious on what you guys are running. I also have another question I heard that due to the elevation where im at a 20g would not really be good, I would be better off with a big 16g??

 

[94_TSi]

just curious on what you guys are running. I also have another question I heard that due to the elevation where im at a 20g would not really be good, I would be better off with a big 16g??

Turbo options are dependant on what you wnat out of the car.

 

[TSI from Hell]

Cat-less anyday; and for the turbo it really depends on your goal like 94 TSi said, speaking of which, you should elaborate.

 

[91Bomb]

Get a TP resonator. Got my stainless off ebay for $31 shipped with gaskets + bolts. The Sound of it is not an issue at all and an improvement over how quiet car is with a stock cat. Don't replace with a straight pipe because sound is crappy compared to a TP resonator.

 

[9O_tsi]

+1 on no cat

 

[combatmedic]

sorry my goals are 350 - 400 whp

 

[eddie_dsm12]

Of course cat less no doubt about it but unlike me I have to run it since I have to go through emissions testing bummer I know.

 

[turbo tim1]

+2 no cat, climate change caused by c02 is a myth.

 

[91Bomb]

I have to go through emmissions every 2 yrs and probably will unbolt the TP resonator and stick the cat back on when the time comes

 

[turbogreyhound]

+3 on no cat. I'm also running a resonator in place of a cat. Casual glance it looks like a cat, in case ever get pulled over.

 

[Absit]

I agree. With these cars, you want the flow. As long as it's not a legal issue where you live, I say no cat aswell.

It's a legal issue for everyone in the US, it is illegal to remove a functioning catalytic converter, a broken cat must be replaced with a factory(ish) replacement.

 

[combatmedic]

I know all the legal issues but where I am there is no emissions testing so I will probably just go with a test pipe. Should I buy a cat back exhaust and get a new test pipe, downpipe and 02 sensor or should I just go to a muffler shop and tell them to custom make a 3 inch exhaust from the downpipe back? Which would be cheaper.

Oh yeah I love how these sti's around here sound ( like a v8) is it just that type of car or the exhaust setup they have?

 

[turbo tim1]

It's a legal issue for everyone in the US, it is illegal to remove a functioning catalytic converter, a broken cat must be replaced with a factory(ish) replacement.

what are they going to do give u a ticket.