Brian Crower BC0310 Dual-Spring / Titanium Retainer Kit for Toyota 2JZ/Supra

Vehicle Fitment

• 1993-1998 Toyota Supra (MK4, 3.0 L 2JZ-GTE, RWD) - all trims
• 1993-2002 Lexus GS300 (3.0 L 2JZ-GTE/2JZ-GE, RWD) - all trims
• 1993-2000 Lexus SC300 (3.0 L 2JZ-GE, RWD) - all trims

Fitment Notes

• High-rpm dual-spring valve-spring kit: requires cylinder-head (valvetrain) access for installation.
• For 2JZ-series (2JZ-GE/2JZ-GTE) engines only; does not fit non-2JZ blocks or other generations without modification.
• Verify your head type (VVT-i yes/no), cam lift and retain installation specs prior to ordering.

Features

• Dual-rate chrome-silicone alloy springs for high-rpm valvetrain stability.
• Titanium retainers (6AL-4V) to reduce valvetrain mass and increase rpm capability.
• Includes matching spring seats and hardware for complete installation.
• Free length 1.671", seat spring height 1.320" @ 98 lbs, open length 0.850" @ 226 lbs, coil-bind 0.795".
• Rated net cam lift up to 0.470" (11.94 mm) -- designed for high-lift cams and forced induction builds.
• Precision machined and balanced for performance street or racing use.

Specifications

• Part Number: BC0310
• Kit Type: Dual Spring / Titanium Retainer / Seat Kit
• Seat Load: 98 lbs @ 1.320"
• Open Load: 226 lbs @ 0.850"
• Valve Lift Capacity: ~0.470" (11.94 mm)
• Free Length: 1.671"
• Coil Bind Length: 0.795"

Included Components

• 24x Dual-rate valve springs (one per valve)
• 24x Titanium retainers (6AL-4V)
• 24x Matching spring seats
• Installation instructions

Product Description

The Brian Crower BC0310 valve-spring kit is engineered specifically for the Toyota 2JZ engine family (2JZ-GE and 2JZ-GTE) found in the 1993-2002 Supra, 1993-2000 SC300 and 1993-1998 GS300. This high-lift dual-rate spring system paired with lightweight titanium retainers is optimized for high-rpm performance, serious builds and forced-induction applications where valvetrain control, spring stability and reduced weight are critical.

With a seat pressure of 98 lbs and an open pressure of 226 lbs, this kit supports net cam lift up to 0.470" (11.94 mm). It's designed to interface with upgraded camshafts, high-rpm builds and race-level usage while maintaining compatibility with high-quality street setups. Installation requires removal of the cylinder head or valve train disassembly. Confirm piston-to-valve clearance, retainer clearance, and verify compatibility with VVT-i or non-VVT heads before ordering.