Hydraulic lifters limit high-RPM stability and prevent the use of higher-lift camshafts on Non-NEO RB20 and RB25 engines. The Tomei Solid Valve Lifter Set (part number TA307A-NS06A) converts these engines to a shim-adjustable solid valvetrain, unlocking greater performance potential while reducing reciprocating mass.
These lifters are a direct replacement for the stock hydraulic units and are adjusted by shims. They require solid-type camshafts and feature a base that is 1 mm taller, designed specifically for φ29 base-circle camshafts. The set is particularly suited for Tomei camshafts with 10.25 mm lift. Manufactured from high-strength chrome-moly steel using a cold-forging process, each lifter weighs approximately 35 grams compared with the stock 57.5 grams, helping the valvetrain remain stable at elevated engine speeds. Note that RB25DET applications require Tomei Valve Springs TA304A-NS06B, and the lifters are not compatible with NEO 6 engines. They are intended for use with Tomei adjustment shims.
At Terra Firma Automotive, we supply this genuine Tomei Solid Valve Lifter Set for builders converting RB20 and Non-NEO RB25 engines to a solid valvetrain. It is a critical supporting component when running higher-lift camshafts and seeking reliable high-RPM control. Choose Terra Firma Automotive for authentic Tomei components engineered for serious RB-series performance builds.
- RB25DET SET Requires Tomei Valve Springs TA304A-NS06B
- NOT compatible with NEO 6
- Genuine Tomei Solid Valve Lifter Set
- Part Number: TA307A-NS06A
- Application: Nissan RB20DE(T) / RB25DE(T) Non-NEO
- Direct replacement for stock hydraulic lifters
- Adjusted by shims
- Requires solid-type camshafts
- Base height is 1 mm extra (for Φ29 base circle camshafts)
- Suited for Tomei camshafts with 10.25 mm lift
- Cold-forged high-strength construction
- Lightweight design: approximately 35 g each (stock is 57.5 g)
- RB25DET set requires Tomei Valve Springs TA304A-NS06B
- Not compatible with NEO 6 engines
- For use with Tomei shims
- Reduces valvetrain mass for improved high-RPM stability
- Available from Terra Firma Automotive
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