Cat or Test pipe?

[thatguyin240]

Since my SR doesn't pass smog at all. is there any advantage by using a Cat rather than just a straight Test Pipe?

[sapix @ RHIT]

If you just feel better about polluting less, use a cat, no real advantages except to the environment.

[sr20wannabe]

**** the environment, if you really cared you would ride a bike. stupid hippies. anyway why not net yourself more power for the same price and get the test pipe. thats what i did

[sapix @ RHIT]

test pipe is definately the way to go, cat drains power and can foul up.

[silviamirage]

what's the difference in power between a decent cat and a testpipe (ballpark)?