APR Performance Valve Springs - DISCONTINUED

The 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 than the high performance OEM Golf R setup and is proven to eliminate the OEM valve train's weakest link.  We call it Performance Without Compromise! Weight reduction, and not necessary stiffness, is absolutely necessary to increasing valve control.  The APR Valve Spring utilizes a beehive design that allows for a reduction in mass in not only the spring itself, but also through use of a smaller titanium retainer.  The springs feature an ovate wire design that allows for even stress distribution resulting in better control at high RPMs th