Integrated Engineering Valve Spring & Retainer Kit | C7 S6 · S7 · RS7 · D4 A8 · S8 | 4.0L Turbo V8 F10 M5 4.4L Turbo V8 [S63] Even the factory K03 and

Even the factory K03 and K04 turbochargers are capable of taxing this system

all without the shocks loading the tires

Reduces weight by 32% over stock (Plastic version)

and software

but also shows that like us

Integrated Engineering Valve Spring & Retainer Kit | C7 S6 · S7 · RS7 · D4 A8 · S8 | 4.0L Turbo V8 F10 M5 4.4L Turbo V8 [S63] Even the factory K03 andThe IE Performance Valve Spring & Titanium Retainer kit features optimized spring rates specifically designed for your Audi 4. 0TT EA824 engine (C7 C7. 5 S6, S7, RS7, & D4 S8). Engineered with exacting specifications to provide proper valve control preventing valve float in high power and high revving applications. Features: Protects against engine failure from valve float Safely increase your rev limit and power band Specialty nano peened springs for