Brian Tooley Racing BTR .660" LS Dual Valve Spring Kit with Titanium Retainers | Fits Gen 3 Gen 4 LS Engines 4.8L 5.3L 5.7L 6.0L 6.2L | High Lift Valvetrain Upgrade

The Brian Tooley Racing .660 dual valve spring kit with titanium retainers is engineered for Gen 3 and Gen 4 LS engines requiring increased valvetrain control for high-lift performance applications. Designed to handle aggressive lift profiles and elevated RPM, this kit delivers the spring pressure necessary to prevent valve float and maintain precise valve motion under demanding conditions. The dual spring configuration improves stability while the lightweight titanium retainers reduce valvetrain mass for enhanced durability and responsiveness. Ideal for street performance, drag racing, naturally aspirated, and forced-induction LS builds, this kit is a proven solution for reliable high-performance valvetrain operation when paired with proper supporting components.

• Spring Specs: 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coil bind @ 1.070" This is a drop in spring kit for all 15 degree LS heads including LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA.
• Dual Spring Valvetrain Control: Provides increased seat and open pressure to prevent valve float and maintain stability at high RPM in performance LS engines.
• Titanium Retainers Included: Lightweight retainers reduce reciprocating mass, improving RPM capability, valve control, and long-term valvetrain durability.
• High Performance Application Ready: Ideal for aggressive camshaft applications in street, strip, boosted, and naturally aspirated LS engine builds.
• Brian Tooley Racing Proven Design: Developed using LS-specific valvetrain expertise trusted across thousands of high-performance LS engine combinations.