Supertech Beehive Valve Spring & Titanium Retainer Set, Audi EA839 2.9T/3.0T

With valvetrain issues becoming more prevalent as the EA839 platform is pushed further, it's important to get ahead of broken valve springs! Pair this kit with updated rollers to bulletproof your heads. An absolute must for any engine built, or as a preventative measure for stock engines. Don't forget to update your rollers during this install! The unique beehive construction provides progressive spring pressures throughout the compression range, reducing moving mass as the lower coils are compressed, providing more mechanical advantage and less inertia. Contact us to arrange installation at our Ontario, Canada location! Includes: 24 valve springs 24 titanium retainers Specifications: Seat Pressure: 73@37.40 ; 84@36 Open Pressure: 173@ 10 ; 164@ 10 Max Lift: 11.00mm Coil Bind: 23.50mm Outer Spring ID: 12.70mm (top) Rate: 8.0 Outer Spring OD: 24.00mm (bottom) Fitment: B9 S4/S5 3.0T B9 RS4/RS5 2.9T FY Q5/SQ5 3.0T 4M Q7/Q8 3.0T Porsche models with EA839 engine