Just as the title says...I want to go ahead and replace the exhaust from the header back. I picked up a 90 CRX Si about three weeks ago and have been driving it the whole time unregistered and without a license plate due to the fact that the exhaust has leaks in multiple places. I've exhausted myself doing countless searches here and on three other CRX forums and I can't quite come to any definitive answers and decisions.

I'm leaning towards a Kteller setup but can't decide if I should go 2.25" or 2.5". I'm going to keep the stock motor for another 35-50k miles. I did a compression test this past Friday, before putting in new NGK Iridium's and OEM Sumitomo wires to replace some crappy Autolite's and crap wires, and the readings were 185, 183, 185, 184. Needless to say I was pumped to see the stock motor so strong after just rolling over 200k miles last week. I'm planning to do a B-series or K-series swap sometime down the line but for now will enjoy the great gas mileage. Knowing this should I just stick with a 2.25" setup?

My main area of confusion comes in with the diameter of the header and inner and outer diameter of the catalytic converter and all the damn options out there. I was ignorant to much of this a few weeks back but am slowly learning.

Sorry for the newbness but what would I need exactly to replace the entire system from the header back? A catalytic converter, the system, and a muffler? Anything else?

What size catalytic converter and what size muffler would I go with on a Kteller 2.25" setup?

I've tried emailing them twice and have yet to hear back from them.

 

Ok...that sounds great.

 

header back you would need a converter and a catback. i would say a 2.25" exhaust and a stock cat. i have one you can have if you pay shipping

 

Thanks for the offer Pee Wee!

What condition is the stock cat in?

 

bump

 

Muffler Shop. Job done.