BeeFly
New Member
I have a 98 civic EX just getting broken in at 194k. Muffler fell off behind the rear flange due to Michigan Road salt induced rust. I bought a Stainless Steel cat back exhaust by Yonaka, all 2.362" diameter pipe (60mm). I went to put it on and found that my resonator pipe had rust welded itself to the catalytic converter. Now I need to replace the Cat. The nice thing about Michigan is we have no emissions laws and it is legal to run without a Cat. On the back of the Catalytic Converter piece there is a port for the secondary/downstream O2 sensor, so I need something that has a port for the secondary O2 sensor.
My aim in this project is to stay as close to stock quiet as possible, more durable exhaust, maintain low end torque, and get better gas mileage. Not really looking for more high end performance, but if I get it I am not complaining
I am on a budget so here is what I have found
Spec D high flow catalytic converter 2.367" inlet 1.998" outlet $32
K2 high flow catalytic converter 2.367" inlet 1.998" outlet $35
Invidia test pipe 2.362" diameter $49
Questions
I am assuming that the pipe coming in off the manifold is 2.367" is this correct?
I dont like the idea of two inches of my exhaust being 2" pipe at the back side of the cat when the rest is 2.367" how much will this hurt my gas mileage?
I also dont like the idea of running catless, pollution/noise, but here is my question would gasses getting to my secondary O2 sensor after running only through a test pipe and not a cat affect my engine performance, gas mileage, or tune?
If anyone has any better suggestions of BOLT ON catalytic converters that have both a 2.362" inlet and outlet for less than oh say $80 let me know.
Also I am obviously replacing the secondary O2 sensor, what are your suggestions on what O2 sensor to get?
My aim in this project is to stay as close to stock quiet as possible, more durable exhaust, maintain low end torque, and get better gas mileage. Not really looking for more high end performance, but if I get it I am not complaining
I am on a budget so here is what I have found
Spec D high flow catalytic converter 2.367" inlet 1.998" outlet $32
K2 high flow catalytic converter 2.367" inlet 1.998" outlet $35
Invidia test pipe 2.362" diameter $49
Questions
I am assuming that the pipe coming in off the manifold is 2.367" is this correct?
I dont like the idea of two inches of my exhaust being 2" pipe at the back side of the cat when the rest is 2.367" how much will this hurt my gas mileage?
I also dont like the idea of running catless, pollution/noise, but here is my question would gasses getting to my secondary O2 sensor after running only through a test pipe and not a cat affect my engine performance, gas mileage, or tune?
If anyone has any better suggestions of BOLT ON catalytic converters that have both a 2.362" inlet and outlet for less than oh say $80 let me know.
Also I am obviously replacing the secondary O2 sensor, what are your suggestions on what O2 sensor to get?