Supertech Performance SPRK-TS1015-SU6 Dual Valve Spring Titanium Retainer Kit

The Supertech Performance SPRK-TS1015-SU6 is a complete dual valve spring and retainer kit engineered for the Subaru EZ30 flat-six engine (1st generation, Non-AVCS). Delivering 63 lbs of seat pressure at 36.1mm, this precision-matched valvetrain kit provides the upgraded spring force needed to support aggressive camshaft profiles and sustained high-RPM operation.

The SPR-TS1015 dual valve springs are manufactured from premium Super Clean Chrome Silicon Vanadium Steel alloy, a high-performance material selected for its superior fatigue resistance, spring rate consistency, and memory retention under extreme heat and load cycles. Each spring is computer-designed to keep wire stress levels within defined fatigue limits, while harmonic resonance is carefully controlled to prevent valve float at elevated engine speeds.

The included RET-TS5.5 retainers are precision CNC-machined from military-certified titanium alloy, reducing reciprocating valvetrain mass for improved throttle response and allowing the engine to rev more freely. SEAT-TS/SUB spring seats are also included to complete the valvetrain package.

Kit Contents (24-valve full engine set):

• Springs: SPR-TS1015 — Qty: 24
• Retainers: RET-TS5.5 (Titanium) — Qty: 24
• Spring Seats: SEAT-TS/SUB — Qty: 24

Key Specifications:

• Spring Type: Dual valve spring
• Seat Pressure: 63 lbs @ 36.1mm
• Material: Super Clean Chrome Silicon Vanadium Steel alloy
• Retainer Material: Military-certified titanium alloy (CNC machined)

This kit delivers everything required for a complete valvetrain overhaul, offering an ideal balance of performance, precision, and durability for high-output builds.