joshSETX

About a year ago i went with a megan racing header and y-pipe, although i have never had my 2003 is put on dyno i believe i lost torque and hp. Did I choose the wrong header? Does anyone have a better suggestion?
Also, how much difference does a aluminum flywheel vrs. stock flywheel make on torque and hp?

sanctfy

i dont know how great the meagan header is but i got the mazzuri header and it added way big power. it along with hks exhaust dropped 0-60 by about .7 seconds(guess). its loud and expensive and removes cats but it is definatly worth it.

Apex84

What happened is you lost power on the low end. Its not the brand of headers at all. From what a lot of guys tell me, once you start doing head work like cams you should fell gains vs loses.

MisterCam

sorry bout stealin your thread and what not, but i tried lookin up the mazzuri headers and it says something bout having to buy a new o2 sensor? would you have to do this with every new headers yhou get or is it rare to do this? and also is 600 for the headers worth it?

Apex84

Majority of the time with most headers you have to replace the 02 sensor with an 02 simulator. If you're def going turbo then the Mazzuri headers are fine, but def not if you're staying NA.