Im looking for everyones opinions on this, would a test pipe be extremly loud? I was going to go with a cat from random tech but thought a testpipe might be a decent money saving idea that would produce equal power.

 

i haven't had a test pipe with an exhaust, so i dunno

I have a test pipe and header now...but no exhaust...so I couldn't tell ya how loud it's gonna be

but your gonna have to find something to do with your 2nd O2 sensor also

 

yeah I know it, Im looking for that impossible balance of cheap,fast, and easy.

 

CAT! It's just not worth polluting the atmosphere for 0.5 HP.

 

I've got a 2.25" straight pipe from headers back with a Tenzo R dual-tip muffler. The oxygen sensor is still at the front.

My **** is LOUD. Not only is it loud, it makes an odd rattling whistle at certain rpms. I set off car alarms even if I drive by at low throttle. WOT is nuts. Sounds like an F1 car on crack going underneath overpasses.

I lost some low-end torque, but gained some fair high-end horsepower. I'm currently seeking a high-flow cat so I can pass local emissions testing.

 

mine also makes weird noises at different RPMS...my custom built 26" test pipe is probably the cause of most though...lol

 

i dunno bout accords...but i've heard a 91 prelude minus a cat with full i/h/e and that car purred nicely...not too loud and it had a nice even tone all the way through the rpm's...but this is a prelude and not an accord...so i dunno if there would be a difference or not!

 

Why the test pipe? I would want the exhaust out as soon as possible unless its blowing straight into the cabin.

 

 

you'd gain a little more than that...it's more restrictive than you think!