I plan on getting the Greddy SE exhaust. Should I get the 63.5mm test pipe or 70mm?

Greddy's specs are 70mm to dual 60mm piping. So I'm assuming I should get the 70mm to match up with the beginning of the exhaust which is 70mm for maximum performance?

 

70mm

 

Would the 63.5mm not match up due to the size difference?

 

It will match up since the flanges are the same, the only difference is the pipe diameter. (of course the flange has a 70mm opening instead of a 63mm) So you can put any size test pipe on any size catback. It would just be worthless to go smaller than your exhaust size. It will match up with the pipe diameter of your exhaust perfect and maybe make a little more power with the 70mm.

 

That's what I figured. Thanks.

Also, the 02 sensor just screws off and I should be able to screw it on the built-in CEL fix?

 

No problem. Yes just un-clip your o2 sensor so you dont twist up the wires, and un screw it. Then just screw it into your new CEL fix on your test pipe and then clip it back in, done!

P.S. The electrical clip is on a little hanger by the tranny. Just look where the wires go and you will easily see it.

 

and then ?

 

 

 

either will do.

essentially, you're going from a 60mm header collector to a test pipe, then to the exhaust.... so 60(h)>63.5(tp)>70(e) isn't going to make much less power than 60(h)>70(tp)>70(e).