Valve Spring KitValve Spring Kit; 4140 Heat-Treated Chrome Molly Steel Spring Seats w/Black Oxide Coating; 6AL4V American Titanium Retainers; Works w/ Valves; 1 Set;SPECIFICATIONS: WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov FEATURES: Increase Valvetrain Control 71 / 19 Percent Weight Reduction Over 2.0T EA113.K04 Retainers / Springs [MK6 R] 20 Percent Stiffness Increase Over 2.0T EA113.K04 Springs [MK6 R] Eradicates Valve Float Issues [MK6 EA888.1] Supports Higher Revving Application Weight Saving Beehive Spring Design ASTM A877A OTSC Round Wire Steel Springs 6AL4V American Titanium Retainers 4140 Heat-Treated Chrome Molly Steel Spring Seats with Black Oxide Coating 29 Grams Per Spring / 2 Grams Per Retainer Plug And Play; Compatible w/ OEM Valves Spring Seats Included To Protects Against Aluminum Erosion In The Head 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!APR LLC is an automotive engineering firm operating a 78,000 sq. ft. performance campus in Opelika, AL with 50 employees. APR was founded in 1997 with a corporate philosophy of Innovation, Integrity, and Excellence. APR's Sole Mission is to provide the highest quality and most highly engineered aftermarket performance products available for Porsche, Audi and Volkswagen vehicles.
