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.

Rebuilt completely in our machine shop, this head will include all new exhaust valves, guides and seals. Unleaded exhaust valve seats are installed. Springs and intake valves checked. Resurfaced

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 ration ''high-lift'' forged rocker set; complete assembly (less springs or spacers) with heavy-duty rocker shaft, steel pedestals and adjustment hardware.

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.

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.