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Michigan Motorsports .650' Ultimate RPM Dual Spring Kit for LS 4.8 5.3 5.7 6.0 6.2 LS1 LS3 LM7 LQ9 LQ4

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$389.99

$ 99 .00 $99.00

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  • High-RPM Stability: Designed for hydraulic roller LS engines, this spring kit offers exceptional valvetrain stability at elevated RPMs, making it ideal for high-performance applications.
  • Comprehensive Kit: Includes dual springs, titanium retainers, locators for stock diameter guides, valve locks, and seals, providing all necessary components for installation.
  • Durable Construction: Manufactured with high-quality materials to withstand high engine stresses, ensuring long-term reliability.
  • Wide Compatibility: Compatible with various GM LS engines, including LS1, LS3, LQ4, LQ9, LM7, and others with 4.8L to 6.2L displacements.
  • Secure Fitment: Engineered to maintain a secure and reliable fit within the engine, preserving performance and efficiency.


Enhance your LS engine's performance with the BTR Brian Tooley .650" Ultimate RPM Dual Spring Kit (SK703). Specifically designed for hydraulic roller LS engines, this kit offers exceptional valvetrain stability at elevated RPMs, making it ideal for high-performance applications. The comprehensive kit includes dual springs, titanium retainers, locators for stock diameter guides, valve locks, and seals, providing all necessary components for installation. Constructed with durable materials, it withstands the rigors of high engine stresses, ensuring long-term reliability. Compatible with various GM LS engines, including LS1, LS3, LQ4, LQ9, LM7, and others with 4.8L to 6.2L displacements, this spring kit is an essential upgrade for enthusiasts seeking enhanced engine performance.