HEAD UNLEADED 25cc CHAMBER SIZE FOR 1380cc
C-AHT133

($1,019.94) £1.019.94 exc vat

($1,223.93) £1.223.93 inc vat

In stockIn stock
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 ...

($1,019.94) £1.019.94 exc vat

($1,223.93) £1.223.93 inc vat

In stockIn stock

Recommended usage 1 x C-AHT133 to fit one mini.

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35.7 x 29.5mm valves in plasma-nitrided EN214N s/steel with manganese bronze valve guides.Nominal 24-25cc with by pass and heater take off holes open. Supersport head-sold on an exchange basis-old core must be serviceable and no cracks--See [link]...

Kit contained products

35.6mm inlet valve in EN52 steel.As it is possible, even common, to swap one head for another on 1275 engines, it is quite easy to become confused or worse yet confuse the parts-guy when it is time to order new valves. Be aware that if the head has b...

29.3mm exhaust valve in EN21 steel. As it is possible, even common, to swap one head for another on 1275 engines, it is quite easy to become confused, or worse yet, confuse the parts-guy when it is time to order new valves! Be aware that if the head ...

Top cap for all A Plus valves with the triple groove collets. Metro from 1984 on and mini 1275 from 1990

Hardened unleaded valve seats for 1.15" 1275 exhaust valves.

Require a recess of 1.2495"(31.737mm) diameter, plus or minus 0.0005" (0.013mm), and 0.250"(6.35m) deep at ambient temperature of 20C.

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...

This is the longer type cylinder head adaptor tube which allows fitment of the by pass hose without removing the head. The shortened hose GZA2083 slides up the tube and then back down on the water pump tube. Frequently rusted on old head...

That tell tale puff of blue smoke when you first start is an indicator of worn guides or seals. Valve guides should be replaced with every valve job.

Sold individually, these are the original quality Cooper S guides for use in any head espec...

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...

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Special extra long nuts were used on some manifolds. These nuts are about an inch long for easy reach and made of brass so they'll never corrode. Especially handy on the inner two studs on dual carb set-ups.

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Standard alloy thermostat housing. If you want the larger bore type as used on the Cooper with a sandwich plate see PEQ10019 housing GRH1140.

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

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