Integrated Engineering Valve Spring & Titanium Retainer Kit | B5 S4 · C5 A6 | 2.7L Turbo V6 E71 X6 35i 3.0L Turbo I6 [N54] Includes Apple and Android Mobile

Includes Apple and Android Mobile Flashing app

the restricted location behind A/C condenser

and filter efficiency to support higher power from ECU tunes and turbo upgrades

A un-calibrated torque wrench can lead to under/over torque and rod bolt failure

Hand TIG welded and pressure tested in USA

Integrated Engineering Valve Spring & Titanium Retainer Kit | B5 S4 · C5 A6 | 2.7L Turbo V6 E71 X6 35i 3.0L Turbo I6 [N54] Includes Apple and Android MobileThis high quality IE valve spring and titanium retainer kit features spring rates optimized to match your vehicle specifications and provide proper valve control preventing valve float in high power and high revving applications. Increasing your engines power output often comes with modifications that require more RPMs to get the most out of it, such as larger turbochargers, tuned intake manifolds, and high output software tunes. Upgrading those