Modified to give maximum performance gain for cost. Combustion chambers, inlet and exhaust ports extensively reworked. Stone-ground finish in ports promotes ultimate atomisation. Three angle valve seats in head. Standard Cooper ‘S’ size valves used. Combustion chamber volume used to boost standard compression ratio slightly for given application. Head mods applied greatly increase Volumetric efficiency, boosting actual working compression ratio. Compression ratio needs to be increased on lower compression engines where modified cam is used to maximise potential. Seek advice on what is needed.

Before fitting to engine, ensure block and head mating surfaces are thoroughly cleaned. If fitting to a new/re-machined block... Read more

Combustion chambers, inlet and exhaust ports extensively re-worked. Smoothed finish in ports - not mirror-finish polished to minimise drag. Multi-angle valve seats in head. Cooper S size valves with current maximum flow profiles and Tuftrided for durability/longevity when used with unleaded fuel (hence 'black' finish). Combustion chamber volume used to give slight static compression ratio increase over standard. Head mods employed greatly increase volumetric efficiency Read more

Modified to give maximum performance gain for cost.

Combustion chambers, inlet and exhaust ports extensively re-worked. Smoothed finish in ports - not mirror-finish polished to minimise drag. Multi-angle valve seats in head. Read more

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The application of this drive system maintains very accurate and consistent cam and ignition timing, and minimising valve train noise. Desireable advantages that do not diminish with time. The fiberglass reinforced belt all but eliminates the excessive stretch suffered by chain driven systems - even where a tensioner is used. Read more

The application of this drive system maintains very accurate and consistent cam and ignition timing, and minimises valve train noise - desirable advantages that do not diminish with time. The fibreglass reinforced belt all but eliminates the excessive stretch suffered by chain driven systems-even when a tensioner is used. Read more

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This flywheel is not balanced so should be before use, along with the prospective clutch assembly.

Before fitting the Mini Spares Ultra-light steel flywheel, carefully examine the crankshaft taper for any burrs or other protrusions caused by fret-welding of previous flywheels. All protrusions of any sort must be removed as they will cause incorrect seating of the flywheel which could, in turn, cause this fret-welding to occur and permanently damage both crankshaft and flywheel. A recognised method of ensuring correct fit is to use fine valve lapping paste to lap the flywheel on to the taper.

A good, correct fit will be confirmed by seeing an even grey finish over the whole of the taper on both components. The paste should then be thoroughly washed off using a strong cleaning solvent (such as cellulose thinners or brake cleaner). Read more

Reduction of rotating mass releases more power to accelerate the car as the engine sees less weight to accelerate. Considering for a Mini that a mere 1lb reduction in the rotating mass of the flywheel causes a loss of accelerative weight to the tune of around 12lb - the benefits of rotating mass reduction are obvious. The C-AEG423 weighs some 4lbs less than the standard item.

To extend it's range of superior quality, light-weight steel flywheels, Mini Spares has produced this component to give the later model, SPi Mini owner the benefits from such weight saving. This component has the flywheel sensor reluctor ring machined into the flywheel itself. However, it is NOT compatible with the standard injection diaphragm/spring. Read more

This flywheel is not balanced so should be before use, along with the prospective clutch assembly.

Before fitting the Mini Spares light steel flywheel, carefully examine the crankshaft taper for any burrs or other protrusions caused by fret-welding of previous flywheels. All protrusions of any sort must be removed as they will cause incorrect seating of the flywheel which could, in turn, cause this fret-welding to occur and permanently damage both crankshaft and flywheel. A recognised method of ensuring correct fit is to use fine valve lapping paste to lap the flywheel on to the taper.

A good, correct fit will be confirmed by seeing an even grey finish over the whole of the taper on both components. The paste should then be thoroughly washed off using a strong cleaning solvent (such as cellulose thinners or brake cleaner). Read more