D Loke

Get a 60mm if you don't plan on upgrading to a 70mm. If you are gonna go with a 70mm exhaust, get the 70mm test pipe. Its best to keep all pipes in the exhaust system the same diameter to reduce turbulence.

Mrwilliams

sweet thanks d loke
im looking at getting a berk so i wasnt sure

but thanks

D Loke

Good choice, thats a good 2.5" test pipe... goes perfect with the stock exhaust.

AP2_S2Kuya

CEL? or no?

07cobaltss/sc

will a high flow cat one set off a cel? and how much whp should u expect? and wat size should a stock s2k go with 60mm or 70mm?

EVAN&MONICA

Your question doesnt make any sense.

Try again later???

A test Pipe is just a normal peice of exhaust pipe that bolts in place of the cat (also reffered to as de-cating the car) when done properly there should be no CEL

Just like a test pipe a hiflow cat shouldnt set of a CEL either (but are not worth the $$$ IMO )

Now for sizing, just match to the catback so if stock catback 60mm is best

AP1rulz

just installed a $42 shipped Ebay RS-Type (resonated); used 2 spark plug anti-foulers (non drilled) for the O2 and no cell! it improved the tone on my HKS Dual; it sounds awesome in vtec and no drone.

s2k_ap1_03

just installed a megan racing test pipe with o2 sensor

first installed no check enging light

a few days later it came on

thought that these came with the o2 sensor to eliminated CEL

why is it on

i checked it and it sasys its the catalyic concverter code only

how do i get rid of the CEL or its normal for it

Mrwilliams

is it necessary to get a tune when buying a TP, or could i just install and go about my way?

skipdodoubleg

getting a CEL after installing a TP is fairly common. The best way to get rid of it is by installing an antifouler or two. These can be picked up at an autozone for pretty cheap. I used the Blox CEL fix from inlinefour.com and it worked like magic on my 06, which are very finicky with TPs.