GSC Power-Division Exhaust Valve Guide Set of 20-Standard (gsc3079-20) 15410 957 S / GTS BMC

957 S / GTS BMC F1 Air Filter

Because they are so much more free flowing than the factorycatalytic converters they let a lot more of the twin turbo V8's natural exhaust note through

RXT IS 255 2009 (17MX-41-0600-3)

Includes Upgraded Yellow Zinc Hardware

Control the behavior at any time via the dash button

GSC Power-Division Exhaust Valve Guide Set of 20-Standard (gsc3079-20) 15410 957 S / GTS BMCGSC has quite simply made a series of valve guides that fit properly, are easier to install, and shaped to help air flow instead of just copying the OEM design. The GSC Power Division valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center. What this means for you and your installer is less time fitting guides to the head due to holding the tightest tolerances in the industry with the best quality