Keep hollowed out cat or put in test pipe?

[nfernotalon]

Hey guys I have my stock exhaust with a hollowed out cat that i did a long time ago, I was just wondering if I should put in a test pipe instead. Would it make a difference?

 

[romeen]

If you are still on the stock exhaust system then I doubt changing your modified cat (which is in essence acting like a test pipe) will make any appreciable difference. Besides, if a cop happens to look under the car everything will look ok. Leave it be IMO until you upgrade the entire thing (which every self respecting driver of a turbo car should do ).

 

[Car_guy_09]

Well with the gutted cat it will create some turbulence in the empty cat casing, But if your on stock exhaust i dont think that a little turbulence in the cat is going to matter much. But if you later upgrade i would say go with a test pipe do to it being a smooth pipe which means no turbulence Or if you want it to look like you have cat, make a strait pipe to put through the casing so its basically a test pipe with a cat casing around it making it look like you have 1

 

[tommy260]

When you get an aftermarket exhaust an aftermarket testpipe may have a better fitment due to the brand new flanges. (no rust because im sure your cat has some now)

 

[skeeter4200]

dont waste your money on it wait like everyone else is saying untill you get a better exhaust system

 

[nfernotalon]

Wow now that the thread was revived I have a 3in catback, should I get a test pipe now?? Also does the Megan DP replace the cat on 1gs or no?

 

[kottyking]

For 1gs you need a cat/testpipe.