Product Details

Audi S5 2014, Valve Spring System by APR®. 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 setup and is proven to eliminate the OEM valve train’s weakest link.

Specifications

Valve Spring Seats Material: 4140 Heat-Treated Chrome Molly Steel

Valve Springs Design: Beehive

Valve Spring Seats Finish: Black Oxide

Includes

Valve Springs
Valve Seats
Valve Retainers

Features

Increase valve train control
71% weight reduction over OEM retainers
19% weight reduction over OEM springs
20% stiffness increase over OEM springs
Eradicates TSI K04 “valve float” issues
Supports higher revving applications
ASTM A877A OTSC round wire steel springs
6AL4V American titanium retainers
Compatible with OEM valves

Founded in 1997 with a corporate philosophy of Innovation, Integrity, and Excellence, APR® is the global leader in performance aftermarket products for Volkswagen, Audi, Seat, Skoda, Porsche, and other vehicles. APR operates a 78,000 sq. ft. performance campus in Opelika. APR develops and manufactures hardware, software, calibration and data-logging tools for engine and transmission controllers, including intakes, exhaust systems, intercoolers, turbocharger systems, suspension, brake systems, wheels, and more to make your vehicle more exciting. At APR, its sole mission is to engineer only the highest quality and most highly engineered tuning products available to provide Porsche, Audi and Volkswagen enthusiasts with the ultimate driving experience. So, get the most out of your pride and joy with APR.

Brand:

APR

Part Number:

MS100091 MS100090

Warranty

All APR products are warranted to be free from defects in the materials and workmanship prior to installation. Warranty is only applicable to the original owner. This warranty does not cover labor, misuse, faulty installation, failure of related parts. APR does not support warranty claims on grey market sales.

ECU UPGRADE LICENSE:

Each APR ECU Upgrade is licensed to a single VIN and customer. An APR ECU Upgrade is non-transferable between multiple VINs. An APR ECU Upgrade included with APR hardware, such as an APR Turbocharger System, is non-transferable between VINs and may require an APR Authorization code for installation.

LEGALITY:

APR, LLC makes no claims as to emission performance for street or highway use. Some equipment is not sold for street use in any state or country where state or federal regulations prohibit its use. Some items provided by APR are intended for off road use only. APR, LLC does not make any claims of street legal use of these products that are not intended for use on public roads. APR, LLC does not encourage street racing and/or illegal racing on public roads. APR, LLC encourages you to take lessons from your local racing schools and/or performance driving school(s) to better your knowledge of the use of your automobile and its handling capabilities if you do decide to race. Always remember to be careful while on the road and be courteous to other drivers. Last but not least...always wear your safety belt!

Magnuson-Moss Warranty Act:

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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APR® - Valve Spring System