Approx 23.5cc combustion chambers for use with dished pistons. This specification of cylinder head is the only modified version for the small-bore based engines Mini Spares supply as it is judged to be the only one worth up-grading to. Based on used ...

Triple groove collets for small bore. 1.043" (26.5mm) Dia x 3.44"(26.5mm) exhaust valve for all small bore castings.

Our race valves are produced in EN214N steel and require Manganese/Silicon bronze alloy valve guides. They are stellite tipp...

Triple collet groove for small bore engines.

The stock intake valves for the 948/998/1098cc cylinder heads are 1.06" or 1.15", if you want better performance you need bigger valves. Our special 1.218" intake valves will fit all small bore he...

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...

Collet for the 3 groove valve. Sold per half and 2 required per valve.

These cotters go with AHU1897 top cap. On Turbo heads after engine number 102641 were fitted on the inlet only.

All early 850/997/998/1098cc heads u...

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...

This kit of head studs is the best available for road and lightly tuned engines. See the C-AHT280 set for highly tuned engines.

The material spec is alloy steel heat treated to 75 tensile tons per square foot minimum and finish...

Minispares own stainless steel Thermostat housing stud kit for the single tier type thermostat housing.Quantity required one kit per car

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...

Genuine version of the thermostat gasket for all A series. Black one side and red the other they are fitted black side to the head. Green to the thermostat.

We have no evidence as yet that they last longer but do look good.

See [lin...

replacements in stainless steel for the heater tap elbow on the cylinder head.

Quantity required one kit per car

Genuine Mini Spares Performance Copper/steel head gasket.

Based on the original AF460 pre 2000 design plus the old Payen Special tuning C-AHT188 with superior sealing rings.

With modern day technology and NON asbestos l...

This kit of head studs is the best available for road and lightly tuned engines. See the C-AHT280 set for highly tuned engines.

The material spec is alloy steel heat treated to 75 tensile tons per square foot minimum and finish...

Made of thicker, more pliant material with larger ports than the original gaskets. A must for use on ported heads.

Original Vented oil filler cap that should be change every 12 thousand miles.

The original flat cap type without breather filter on early minis has now been deleted by Rover and replaced by this filter type.

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

MPI specification of cylinder head, based on used core castings, modified in true Road sport style to maximise on-road performance for those wanting maximised drive-ability w...