Get rid of your heavy shim over bucket with this shim UNDER bucket design.
There are a number of troubling antics that come along with the design of your HLA setup or Shim OVER bucket from the later BP engines:
- Oil loss and functionality of the under bucket design
- Shim POP at high RPM from your over bucket disc
- Weight causing spring fatigue at higher RPMs.
Fit's all 90-05 Miata:
- Diameter: 30mm
- Length: 26mm
- Post Thickness: To be used with 6mm lash cap on the post - contact us after you've measured
- Completely CNC machined from heat treated billet provides only the necessary and calculated thickness of the walls with very special shapes, providing better rigidity with an important reduction in weight.
- The lifters are fully Nitrided and polished to harden the surface for low wear. Higher cam lifts and rpms will submit conventional lifters to an important wear.
- Surface is carefully finished by grinding it to a much lower surface roughness for lower friction with the cams, cylinder head bore, providing longer durability.