APR Audi/Bentley/Lamborghini/Porsche/Volkswagen Valve Spring Kit - Single

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 EA113.K04 (MK6 R) setup and is proven to eliminate the OEM valve train's weakest link. We call it Performance Without Compromise!

• 4140 heat-treated chrome molly steel spring seats with black oxide coating
• Spring seats included to protects against aluminum erosion in the head
• 71% weight reduction over 2.0T EA113.K04 retainers (MK6 R)
• 20% stiffness increase over 2.0T EA113.K04 Springs (MK6 R)
• 19% weight reduction over 2.0T EA113.K04 springs (MK6 R)
• Eradicates valve float issues (MK6 EA888.1)
• ASTM A877A OTSC round wire steel springs
• Supports higher revving application
• Weight saving beehive spring design
• 6AL4V American titanium retainers
• Increase valvetrain control
• Compatible with OEM valves
• 2 grams per retainer
• 29 grams per spring
• Plug and Play