As an engine wears, the clearance between the valve stem and guide increases; as this gets beyond tolerances the car will tend to smoke under deceleration (when you take your foot off the throttle). Good valve stem seals will allow for greater wear b...

Genuine Mini Spares valve stem oil seal manufactured with original Dupont Viton, as fitted to the twin points engines, are the best material and seal you can use and although expensive are the best to date in stopping the engine smoking.

Man...

1.158" (29.4) dia exhaust valve for 12G940 casting.

Our race valves are produced in EN214N stainless steel and require Manganese/Silicon bronze alloy valve guides. They are stellite tipped and have the triple collet groove and c...

35.6 x 29.3mm valves in chrome stem with cast iron valve guides. This specification of cylinder head, based on used core castings, is modified in true Road sport style to maximise on-road performance for those wanting maximised drive-ability when ...

35.6 x 29.3mm valves in chrome stem with cast iron valve guides.

By pass hose tube and heater outlet open. This specification of cylinder head, based on used core casting, is modified in true Road sport style to maximise on-road performance ...

New MPI 1275cc head casting built up with new valves and springs etc; all set up for unleaded fuel. Last of these brand new castings but obviously slightly soiled paint etc through age. Has standard size valves 33mmx29mm.

For NON MPI cars s...

35.6 x 29.3mm steel valves with chrome stems and cast iron valve guides.

No by pass hose and blanked off heater outlet as per SPI heads

This specification of cylinder head is modified in true Road sport style to maximise on-road pe...

New competition valve cotter, these are precision CNC machined from 4340 and heat treated to a better spec than EN24T and claimed to be stronger in fatigue life.

These locate better in the valves and easier to control spring heights.

Genuine Mini Spares valve stem oil seal manufactured with original Dupont Viton, as fitted to the twin points engines, are the best material and seal you can use and although expensive are the best to date in stopping the engine smoking.

Man...

EXHAUST VALVE 1.15 TURBO

.3135 thou (7.96mm) thick, uses CAM6573 collets only.

1.1" diameter intake valve for 948cc with 8.65mm wide groove for use with the original 88G616 top caps and 2A11 cotters which are now available as 2A11EVO.

160lbs on the nose at 400" for standard Cooper S or twin spring set ups. See C-AEA526 and C-AEA527 for later developed springs. These are ok for all standard uses but are improved and uprated over all original factory fitted...

Early Large cotter groove exhaust valve. Most small bore engines seem particularly prone to burning valves, it is highly recommended to replace the exhaust valves when you do a valve job! This 1.0" valve fits most early 948cc, 998cc and 1098cc engine...

1.402" (35.6mm) dia x 3.57" long intake valve.

Our race valves are produced in EN214N steel and are stellite tipped and use the latest triple collet groove and current valve head shapes, plasma heat treated for eradicating unleaded petrol we...

1.311" (33.3mm) dia x 3.57 long intake valve.


Our race valves are produced in EN214N steel and rquire Manganese/Silicon bronze alloy valve guides. use the later narrow, single collet groove and current valve head shapes.


As ...

1.401" dia x 3.52" long intake valves. Our race valves are produced in EN214N steel, stellite tipped and use the later narrow collet groove and current valve head shapes. As it is possible, even common, to swap one head for another on 1275 engines, i...

chrome on en214N steel enables fitment of this valve to standard iron guides.

the flow characteristics of this valve are claimed to give better power when used on standard applications. 35.7mm)1.405") for 12G940 large bore casti...