BMW RPI GT Headers E63/64 M6

Why choose the RPI BMW E63 E64 M6 GT Headers?

The M6 header manifold kit offers performance, quality and flexibility. With a specially designed expansion chamber, torque is increased dramatically in the low and mid range while giving significant hp increase throughout the entire powerband. The RPi header set allows the user to switch between the factory catalytic converter and the race pipe via a specially designed v-band clamp.

How much gain can I expect?

Take a look at the dyno below (done on the M5, but similar on the M6)