xluigix47

I have a 94 civic ex and ordered a test pipe from ebay to replace my bad catalytic converter... but i wasnt sure the inlet and outlet size!!! the test pipe says its a 2.25" inlet and outlet.. will this work with my stock exhaust system or would i have to modify it to fit!?

JuggerNaut-CTR

I love the people who buy a part before doing research to see if it fits....

Lucky for you, you may need a slightly bigger donut gasket at the manifold outlet to test pipe inlet. The testpipe outlet should be fine bolting up.

sleepyaccord96

sounds like a empty test pipe which serves no purpose besides replacing the cat with a empty bolt on pipe.

WHich in your case being it is a 94 will be perfectly fine and you will see 1-2 hp gain at most and no worries about the check engine light, it will not come on so no problemo.

grumblemarc

iTrader: (4)

Don't understand why no attempt was made to install it before worrying about install issues? This is why you don't buy near universal products. If you're worried about restriveness, don't. It's a Civic. It's already restrictive.

xluigix47

Thanks for the replies but yeah, i should have done my research first.. i still havent recieved it but just wanted to ask... and will i have to make a defouler for the o2 sensor? cuz i heard people have gotten the P0420 code and using a defouler to get rid of it. So the test pipe might work with my stock exhaust??

B_Swapped93

it should may need a bit of adjustment but nothing big. D or B engine ?

sleepyaccord96

d16z6

HondaPartsHero

OBD1 doesn't have a secondary 02 so no defouler needed. But you could have just punched out the stock cat for free.

Telecatster

+1

sleepyaccord96

^^ already stated.