APR Valve Spring Kit | 42 R8 · 4S R8 | 5.2L V10

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Description

APR Valve Spring Kit | 42 R8 · 4S R8 | 5.2L V10The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer

and above all -fun

This design separates more oil than the traditional catch can designs and keeps the liquid in the chamber and out of your engine bay

APR Roll-Control Stabilizer Bars are designed to improve corner handling without diminishing ride quality

G25-660 turbocharger

while our Helmholtz resonator reduces unwanted frequencies

we have designed a billet breather plate with a complex baffle system

96 Inches of 200 PSI hose

IE engineers have employed advanced 3D scanning equipment and rapid prototyping techniques to ensure a tight

In-house CNC machined for perfect fitment

Increases supercharger RPM by 27

No need to press on an upper supercharger pulley

The rear upper control arm bushings are responsible for controlling the camber of the rear wheels