Classic Mini DIY: New Project Reveal

Our high performance engine has all the features of our standard engine, but comes with a fully ported cylinder head, high compression Cooper S pistons, performance cam, ARP high-strength head studs and rod bolts, and flywheel assembly. Each engine is balanced. Power output will be significantly higher than the standard engine, with a power band between 2000-7000 RPM and a slightly lopey idle.

The same careful assembly practices go into our stock rebuilds as our championship-winning race engines. Included in each package is a fully bored and rebuilt 1275 A-Plus engine, rebuilt rod change transmission with 3.44 final drive, reconditioned one-piece pre-Verto flywheel and clutch assembly.

All-new aluminum 1275 cylinder head, based on the 12G1805/12G940 late Cooper S head casting. 1.4" intake and 1.15" exhaust valves, with hardened valve seats, bronze guides

All-new aluminum 11-stud 1275 race cylinder head, based on the 12G1805/12G940 late Cooper S head casting.

Cylinder head for single-point injection (SPi) classic Minis. Casting #12G940, rebuilt fully in our shop with all new iron valve guides, exhaust valves and seals

Fully rebuilt in our shop to include all new iron valve guides, unleaded exhaust seats, exhaust valves and seals. Modified for unleaded fuel.

Inlet Valves: 35.7mm(1.401") dia. modified original equipment type Exhaust Valves: 29.3mm(1.150") dia. modified original equipment type Exhaust seats: Latest type Beryllium-based for lead-free fuel Valve Guides: Cast iron Valve Springs: