99 civic si

I have searched, but couldnt find anything.

I am turboing my car and since i am going to have to switch to obd1 would my cat matter if i took it off.

I know it will be louder, but air will flow better. plus cheaper than a high-flow cat.

Is there a way to cheat the code the o2 sensor throws with no cat while your obd2 though.

thabks for the help.

h2392si

if your turbo it maybe a good idea, but if your not your car will sound like crap and smell like it also. get ready to sound like a bumblebee.

siregcivic

if ur going turbo take the cat out.... it will provide a faster spool up also the turbo will quiet the exhaust down a bit too... if ur gonna go obd1 then dont worry about the secondary o2

siregcivic

im going to be turboin the d16z6 in my hatch soon i have now 2 1/4 straight pipe to a stock muffler... the actual stock muffler of the hatch too.. hahah quiet

_Maverick

it will sound reel loud......
i run catless on my Civic
but if u want a little flow.........run it right out of the header 2 the back of the front tire...if that makes sence

M

blackeg

i run no cat on my turbo civic. 3 inch downpipe, 2.5 inch testpipe where the cat was, and a greddy evo catback from there out. its really not too too loud, but my car smells like crap and smokes a lil becasue there is no cat there. ideally, 3" from the turbo all the way back would be best

Rich93DS

i got a 93 B16 del Sol and all i run is a 2.5in pipe all the way back to a cheep muffler and it runs and sound fine

evade this honda

no cat= no back pressure which in an n/a car you need it helps with power. but on the other hand if your turbo the less back pressure means better flow in return means more power..... I recommend a high flow cat and if you go turbo get the test pipe and you would be straight .

peacexisxfree

i run no cat as well with a built gsr. like others have said, prepare for your car to smell.

11SEC CIV

3 inch turbo back w/ no cat....BUT...I dont know how your state is w/ emissions but you might want to take that into consideration