so i just got a 93 civic with a b18b1 and car has no cat, and a magnaflow exhaust and it is too loud for my taste, i want to try to barr the car so i want to intall a new cat..so my question is, how much power will i be loosing by installing the car? cuz the car pulls preety good, and how less loud will it be?

 

I don't think you'll be able to feel it since your car doesn't "heavily" rely on having no back pressure. But since you're doing it and you're aware that it lowers the power, you might notice it. It's a LS motor afterall.

 

are all the obd1 cats the same? or do i have to get one specifically for a b18b1 engine? a friend is selling a obdx high flow cat for $100..and the exhaust shop is charging me $250 for an oem one installed?

 

i would just find a used cat locally but yea really doesnt make alot of difference on a stock motor power wise. might not even tell a difference. as in sound should be alot queiter. i had a resonator installed when i didnt have a cat . help a lil on the noise.

 

It was illegal to buy a used catalytic converter last time I checked... Maybe that's just here in FLA, but why would you want a used one anyways...?? Take care of your car man, don't half *** it on things like this, that could potentially lead to more trouble down the road...

A high flow cat is basically a stock cat, but semi-gutted if not fully gutted with a bigger circumference to allow more exhaust out... When I removed my cat for a test pipe it was a little deeper of a sound but I also had an A'pexi N1 setup on a 3" full exhaust and I was boosted so it was quieter than stock already... What kind of car do u have (coupe, hatch, sedan)..??

 

yea not to mention you can get high flow/"race" converters for 100$ off the shelf new.

a used converter? no sir.

 

Honda cats are pretty efficient, it won't really take away much power on a stock motor.

 

ur best bet is to just buy a high flow one new

 

So went to the exhaust shop and they installed magnaflow CA legal 65604 cat. The car sounds much better and didn't loose any power..maybe I will put a resonator too or just get a stock exhaust

 

Wanna sell ur magnaflow..??