Description
Maximize the performance potential of your Audi 4.0T twin-turbocharged V8 with IE’s Performance Valve Spring & Titanium Retainer Kit. This high-performance valvetrain upgrade is meticulously engineered for the EA824 4.0TT engine, found in C7/C7.5 S6, S7, RS7, and D4 S8 models, delivering the valvetrain control necessary for high-boost, high-revving applications.
Whether you're pushing a stock turbo to its limits or running a big-turbo build, this kit ensures you eliminate valve float and unlock a wider, more reliable powerband.
Key Features
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Eliminates valve float in high-RPM, high-boost applications
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Extends rev range safely with proper valve control
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Premium multi-stage nano-peened valve springs for long-term durability
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Precision CNC-machined titanium retainers for strength and reduced valvetrain mass
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Optimized for all EA824 4.0TT engines
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Crafted from the highest quality spring materials in the world
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Tested and validated in-house under high-power torture scenarios
What’s Included
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32 precision wound valve springs (intake & exhaust)
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16 titanium intake retainers (CNC machined to exact tolerances)
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16 titanium exhaust retainers (CNC machined to exact tolerances)
Why Upgrade Your Valve Springs?
Increased power often requires higher RPM to fully leverage upgraded turbochargers and supporting modifications. However, pushing RPM limits on factory valve springs risks valve float, leading to power loss, misfires, or catastrophic engine failure. The IE valve spring and retainer kit is designed to handle extended RPM ranges and boost pressures—delivering the control needed to keep your valvetrain in check.
Purpose-Built for Audi 4.0T (EA824)
Unlike universal spring kits, this application-specific kit was developed exclusively for the Audi 4.0T EA824 platform. It features an optimized spring rate designed to provide the perfect balance of stiffness and longevity, tailored specifically for the unique valvetrain geometry and turbocharged demands of these engines.
IE avoids the "stiffer is better" myth—ensuring you won’t suffer the downsides of excessive spring load, such as unnecessary cam wear or excessive stress on valvetrain components.
Precision Engineering & Testing
Each component is tested in-house under high-RPM and high-load conditions to ensure absolute reliability. The titanium retainers offer exceptional strength-to-weight ratios, reducing valvetrain mass and improving RPM response. Every piece undergoes precision machining, surface finishing, and stringent QC inspections for OE-level reliability with motorsport-grade performance.
Vehicle Fitment
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2012–2018 Audi S6 (C7/C7.5) – 4.0T V8
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2012–2018 Audi S7 (C7/C7.5) – 4.0T V8
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2014–2018 Audi RS7 (C7/C7.5) – 4.0T V8
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2013–2018 Audi S8 (D4) – 4.0T V8
Compatible with all EA824 4.0L twin-turbo engines
