Hey Guys,

My R has the ecu tune, and a custom exhaust, I was wondering if there was any other way to boost it's horsepower to 600 without adding the pulley.

 

intake wont help much, there's not much else you can do

why dont you want to do the pulley? you can easily get another 40-50hp....and its a $100 mod (plus installation)

 

are you referring to the upper or lower pulley? The lower pulley will get you the large gains, but it is closer to $900. The upper pulley is good for a few extra HP (maybe 15-20HP) but will give you a good bump in low end torque...however, it is a PITA to install and you pretty much have to destroy the OEM pulley to get it off. Go for the lower pulley if you can. It will really beef up the responsiveness and the torque/HP increase can be felt throughout the powerband. You really wont feel the upper pulley on the XFR.

 

For 600 HP just do the kinds of things avos did. Read his posts.