Best size on exhasut

[My93Cb7]

i just did an h22a4 swap on my cb. and i want to know wats the best exhasut size i should go with. reason being is that i heard that my 2 1/4 piping is to small and isnt lettin my motor perform right, any advice will be great thanks

[Juan4DCB7]

correct me if i am wrong but for a car that is not running boost, or high horsepower, 21/4 is perfect.

[My93Cb7]

ok cool. i was just wondering cuz i went to a shop out here and they said i should run 2 1/2 to get better response out of my swap...but thats why i decided to ask here before i went and got it done. thanks

[xkjnboix]

i just did an h22a4 swap on my cb. and i want to know wats the best exhasut size i should go with. reason being is that i heard that my 2 1/4 piping is to small and isnt lettin my motor perform right, any advice will be great thanks

so when honda built the h22a4 and tuned it with the proper ecu and the oem exhaust for the prelude (which mostlikely the same diameter or like .25"-.5" larger AT MOST if that lol) then they werent tuning the motor to "perform right"??

if ur trying to ask what size piping would give you more horses then idk. oem is fine to me.

[fatboy1185]

If you plan on upgrading your engine, wait til you purchase a new header, then have 2.5 inch or 3 inch exhaust put on.

[evil_demon_01]

i just did an h22a4 swap on my cb. and i want to know wats the best exhasut size i should go with. reason being is that i heard that my 2 1/4 piping is to small and isnt lettin my motor perform right, any advice will be great thanks

Are you still using the Oem Cb piping?

[My93Cb7]

no i have 2 1/4 on it right now. i just heard if i put 2 1/2 piping on it, the car will run better. this is the reason why im posting on here

[Teddy]

the bigger the better 2.5 or 3

[Shadow1]

the bigger the better 2.5 or 3

that only applies to an extent.


to the OP, if your just running with the usual bolt ons, 2.5" will be fine for a DD H22a swap. unless you boost or have a built motor, theres no point in going 3". then you'll just be getting rasp and lose torque.


so no Teddy. bigger isnt always better.

[My93Cb7]

ok so 2 1/2 will b just fine with the normal bolt on's. great thanks alot guys

[Shadow1]

ok so 2 1/2 will b just fine with the normal bolt on's. great thanks alot guys

any time homie just please....PLEASE keep your cat and get a resonator. your not building a track car so the rasp will annoy the cops and others and possibly you. especially at highway speeds. 4k at 70mph on your H22? dont think you'll like that.

[Sarthos]

I just put a silencer in my muffler to shut up the rasp because it annoyed the shit out of me lol

[Shadow1]

I just put a silencer in my muffler to shut up the rasp because it annoyed the shit out of me lol

lol.


what size exhaust do you have? do you still have your catalytic converter on? any resonators?

[Sarthos]

2.5" exhaust, it has some kind of high flow catalytic converter/resonator. But the thing is pretty much ANY noise that gets into the car annoys me. I prefer the music, and there's pretty much no amount of insulation that could keep the muffler's sound out of the car so I silenced it.

[Shadow1]

2.5" exhaust, it has some kind of high flow catalytic converter/resonator. But the thing is pretty much ANY noise that gets into the car annoys me. I prefer the music, and there's pretty much no amount of insulation that could keep the muffler's sound out of the car so I silenced it.

what kind of motor do you have? H22? F22a?


if you put a OEM cat on, it should dampen the sound down much better than that high flow cat. or you can go for one from Magnaflow. what kind of muffler do you have?