Michigan Motorsports .550" Lift Beehive LS Valve Springs & Hat Seals | Fits 4.8L 5.3L 5.7L 6.0L 6.2L (LS1 LS2 LS3 LS6 LQ4 LQ9) | Replaces GM #12713265

Unlock more power and RPM potential in your LS build with Michigan Motorsports' .550″ Lift Beehive Valve Spring and Seal Kit—a direct-fit performance upgrade that crushes stock spring limitations. Engineered for aggressive cam swaps and high-revving setups, these 1.250″ beehive-style springs handle lifts up to .550″ while maintaining superior seat pressure and valve control. Built as a drop-in replacement for GM part #12713265, this kit includes 16 high-strength springs and premium hat-style valve seals with integrated spring locators to keep everything in check under heat and pressure. Whether you're building an LS street bruiser or dialing in a mild boosted combo, these springs deliver the performance, durability, and control your valvetrain demands—without the bulk or complexity of dual springs.

• Built for .550″ Lift Camshafts – Engineered to handle aggressive cam profiles with up to .550″ of lift, making it perfect for street/strip and boosted applications needing added valvetrain stability.
• Aggressive Beehive Design – Reduces mass in the valvetrain, improves harmonics, and increases spring efficiency at higher RPMs—ideal for maintaining control in performance engines.
• Direct Fit for 4.8–6.2L LS Engines – Installs without modification on LS1, LS2, LS3, LS6, LQ4, and LQ9 cylinder heads—drop-in replacement for GM 12713265.
• Includes Premium Hat Seals with Locators – Comes with 16 integrated valve stem seals and spring locators, providing superior oil control and top-end reliability under demanding conditions.
• Optimized Seat Pressure and Spring Rate – Delivers 90 lbs at 1.800″ installed height with 295 lb/in spring rate, offering reliable performance without coil bind or float.