Mugen or J's. Both are high end JDM.

 

J's Racing, biggest piping dia. means more high end power, and it still has good gains throughout the whole powerband

 

For reals. I saw on King's website they're not getting any mugen exhausts till september!

 

forget an upgrade just stick to stock and get it port and polished like i did. i got some good numbers from dyno by going that route

 

ANYBODY HAVE A dyno for the j's or a stock header ported?

 

i got about 5-7ps to the wheel for my 04 but considering the $175.00 i paid for my port vs a $400 dollar after market one, i thought it was worth it.I would just go this route and then get it coated if your serious about maximum gains.