hey guys had a good question. im buying the CA header for 220 and the gm exhaust for 400. now i would like to also get the highflow cat from CA aswell but they only sell it in 3" or 2.5" and the header is 2.25 and the exhaust is 2.25 the downpipe i believe should bolt up to the 2.25 header from CA but not sure about GMs exhaust has anyone tried it or does anyone know anything i dont thanks

ryan.

 

It will all bolt up fine though man. I too have the CA header, which has a 2.25" collector. The only reason its got a 2.25" collector is b/c he (Kenny of Cobalt Addiction) wanted a nice torque curve across the power band, which headers w/ bigger collectors can't provide, as the large collector will give you more power in the later RPMs. The CA header won't give you as large of gains as some with larger collectors probally, but it gives you nice, well rounded useable power. I also have the CA 2.5" de-cat downpipe, and the ARK N2 cat-back, which means my system goes 2.25"---2.5"---2.5", and everything bolted up and works fine!

 

cool man that sounds awsome i think should i get the downpipe now and then tune my car with hptuners i believe they will make the car run with the new exhaust and header so it doesnt throw codes correct and i still get that nice hp and torque and sound. im not sure what they do for 550 bucks theres this shop by me that will do hptuners for 550 with dyno run. which is ok i guess. but i dont know know how to do the tune myself and i think im better off.

ryan.