1.45″ Steel Tappets – Designed for High RPM & Heavy Valve Spring Pressures
Upgrade your valvetrain with our 1.45″ Steel Tappets, engineered to handle 110# or heavier valve springs in high-rpm, performance-focused diesel engines. Built for superior wear resistance and consistent lift, these tappets help maintain precise valvetrain geometry under extreme conditions.
Key Benefits
High RPM Durability: Perfect for race or competition builds pushing beyond typical street RPM ranges.
Supports Heavy Spring Pressures: Stable under 110# or greater valve spring seat pressure, ensuring reliable performance.
Steel Construction: Delivers excellent wear resistance and extended service life compared to stock components.
Improved Valvetrain Geometry: Reduces deflection and maintains accurate valve lift for optimal power output.
Whether you’re chasing horsepower gains or simply seeking bulletproof reliability under heavy load, our 1.45″ Steel Tappets provide the strength and consistency your engine demands.
Application and Fitment Coverage
The 1.45" DLC coated steel tappets is a Cummins tappet/lifter used across these Hamilton Cams Cummins application groups.
1989–1998 12-valve Cummins
1998.5–2002 5.9L 24-valve Cummins
2003–2007 5.9L common-rail Cummins
2007.5–2018 6.7L Cummins
Original Hamilton Cams reference terms include Cummins 12 Valve Valve Train, Cummins 24 Valve Valve Train.