Classic Mini DIY: How to Restore a Classic Mini Head Pt 2: Rockers & Shims

All-new aluminum 1275 cylinder head, based on the 12G1805/12G940 late Cooper S head casting; CNC ported and flowed for street performance.

A 1275 cylinder head, casting #12G940, rebuilt fully in our shop with all new iron valve guides, unleaded exhaust seats, exhaust valves and seals.

Latest-type rocker arm, as introduced on A+ engines. Reprofiled tip, said to run quieter. Can be used on any A+ or A-series when used in sets of eight.

Forged steel rocker set in 1.4 ratio; ideal for both street and race applications, and avoids the high stresses and wear of 1.5 ratio.

1.5:1 ratio ''high-lift'' forged rocker set; complete assembly (less springs or spacers). Ref: C-AHT436, SEN0027.

Bolting on high-lift rockers can give classic Mini engines much greater top-end power. 1.5 ratio rockers open the valves faster and further, while maintaining the same duration. Ref: C-AHT446, C-AHT446A.

New high performance 1.5 ratio high-lift alloy roller-tip roller rockers. Features pedestals with extensions so each rocker is within a pair of supports, this new design reduces flex.

These .051'' shims go underneath the rocker pedestals for small adjustments. Ref: C-2A515, 2A515.