IAG Performance Single Valve Spring Set w/ Titanium Retainers EJ20 / EJ25

The IAG Single Valve Spring and Titanium Retainer Set is a high-performance upgrade designed for all Subaru EJ20 and EJ25 engines. This set reduces valvetrain weight by up to 153.6 grams and increases spring pressure, allowing for higher boost and RPM capabilities over stock components—ideal for race and high-performance applications.

Features:

• Lightweight Titanium Retainers: Precision-machined to evenly distribute spring load, reduce valvetrain weight, and allow for higher engine revs without sacrificing control.
• High-Quality Valve Springs: 16 springs made from chrome-silicone alloy steel, engineered to withstand extreme loads and stress at high RPM.
• Improved Valvetrain Performance: Less weight on top of the valves ensures more precise, stable movement and optimal engine performance.

Compatibility & Usage:

• Compatible with IAG 550 and 750 Cylinder Head packages used in 550 and 750 BHP EJ25 long blocks.
• Suitable for stock replacement or with Stage 1 and Stage 2 camshafts for mild street or road race applications.
• Safe operation up to 8,000 RPM.

This set is perfect for enthusiasts looking to maximize valvetrain efficiency and durability under high-performance conditions.

• 85 lbs @ 1.320" - Seat Pressure
• 199 lbs @ .893" - Open Pressure

Note: Valve keepers/locks are NOT Included, May be used with OE cams or S1/S2 GSC cams or similar.