As far as Mugen Header not sure...I have the 2nd Gen Megan Racing Header. My decision not to go with Mugen...$800.00 plus this is my daily sales driver so I could not see spending that kinda money...but Mugen is Top Notch!
The Header install was easy, as far as gains YES. A big difference! In pulling power, a tad louder at higher rpm's..like 4-5grand. Not really noticed at low rpm's like 2-3,500 ish. I would say overall increase mid to high end power...nothing below that IMAO. As far as other mods, have the CAI N AXLE BACK.
Stock Headers are extremely restrictive! MPG has taken a little dip though! Makes the car much more fun to drive.....example...pulling onto a freeway / highway and prior to headers...car was sluggish and didn't pull. Now with the headers you will be able to pull getting onto a freeway / highway. Hope this helps n puts into visual experience.
GD3blaze07'
