COMP Cams GP965-1 Dual Valve Spring .550" Lift for Briggs Flathead Engines

The COMP Cams GP965-1 is a high-performance dual valve spring engineered for Briggs flathead engines running valve lifts up to .550 inches. Designed for Jr. Dragster and Open Modified competition classes, this spring delivers the precise pressure curve needed to maintain valve train control at elevated RPM and power levels.

Part of COMP Cams' COMPGoParts Go-Kart and small engine performance line, the GP965-1 is built using Pacaloy® — an advanced high-tech spring material utilized in top-tier racing applications. The dual-spring design provides superior valve train stability, a broad usable RPM range, and long-term consistency compared to single-spring setups.

Key Features:

• Dual-spring design for maximum valve train stability and RPM range
• Supports valve lifts up to .550"
• Seat pressure: 35–40 lbs; Nose pressure: 142–150 lbs
• Constructed from Pacaloy® high-tech spring material
• Engineered using NASCAR and NHRA design processes and technology
• Sold individually (single spring) — MPN: GP965-1
• Compatible with Briggs flathead engines used in Jr. Dragster and Open Modified classes

For racers building a complete valve train package, the GP965-1 pairs with the GP759-2 dual spring retainer, GP642-2 valve locks, and GP4787-2 spring seat spacers — or opt for the GP965-KIT for a ready-to-install bundle.