£73.50 exc vat
£88.20 inc vat
In stock
This piston has a possible compression ratio of 10.3:1 as fitted to Cooper RSP 1990. The engine then becomes 1328cc
The best performance 1275 pistons are C-STN100 range which have 9.73cr when the piston is 1mm down the block. Current pistons differ from the 60s originals and now have a "low drag" slipper skirt design and a shorter lighter 20.6mm wrist pin. Wrist pin height is 1.5276" to crown with a top dish of 8cc.
Performance is enhanced by the use of 3mm oil rings and the smaller drain slot behind this ring decreases the risk of breakage and 2 of 1.5 mm compression rings. Crown depth to first ring is about 10mm
Rings are R41570-60.
AE Hepolite is now owned by Federal Mogul and trademarked "Nural"
.Now Nural stamped 87-524114-00
Sold singly,4 per engine required--
£73.50 exc vat
£88.20 inc vat
In stockRecommended usage 4 x P21253-60 to fit one mini.
Mini Spares own Universal gasket set for solid wall blocks
For any manual block, includes gaskets for "A"Plus and pre A Plus timing covers, but is less tappet chest cover gaskets. Does not include clutch oil seal.
We now offer an en...
Mini Spares Evolution Lightweight Performance Piston.Single piston and rings.
Press fit only. Same design as C-STN103 range but different manufacturer.
The ultimate in lightweight die cast pistons, available in +.020, +.040 & +.060...
These Swiftune die cast performance pistons are part of their new Heritage range and are manufactured by global leading F1 German piston manufacturer Mahle. These pistons have been developed using their 50 plus years of experience. Glyn Swift was usi...
Low drag 1275 piston standard size 2.780 (Rings included).
This piston has a possible compression ratio of 10.3:1 as fitted to Cooper RSP 1990.
The best performance 1275 pistons are C-STN100 range which have 9.73cr when the piston i...
3mm OIL RING with compression ring size .0591" (1.5mm)and one piece oil ring .1181" (3mm)on p21253 pistons giving 9.7cr on 1275cc. std ring size
For performance see steel ring set with 3 piece oil ring as favoured by engine builders[link]C1...
Low drag 1275 piston standard size 2.780 plus 20 thou oversize(Rings included).
This piston has a possible compression ratio of 10.3:1 as fitted to Cooper RSP 1990.
The best performance 1275 pistons are C-STN100 range which have 9.7...
998cc dished circlip type piston with 4 rings. Compression range of 8.3 to 9:1 depending on block and head but for best performance use later 3 ring flat top piston ADU3490-20. Sold singly,4 per engine required
original pistons stamped 21963 for mini engines from 1990 on
2 x 0591" rings and oil ring .1181.
This info correct page 8 in catalogue is wrong--uses 3mm oil ring
20 thou oversize low drag slipper type pistons for modern day compression ratios and unleaded fuel.
Typically installation will result in a minimum 8.8:1 compression ratio but on some pre 1984 Metro versions it was higher.
Current...
For the ultimate in 1275cc overbored engine performance, double heat treated pistons. You can't beat cubic inches for performance, and the A-Series block can be bored far bigger than the factory ever imagined. The standard bore is 70.6mm, the 1380 bo...
3mm OIL RING with compression ring size .0591" (1.5mm)and one piece oil ring .1181" (3mm)on p21253 pistons giving 9.7cr on 1275cc. 60 thou oversize
Rover piston were stamped 21963 for high compression but 21962 seems to be stampe...
Low drag 1275 piston standard size 2.780 plus 40 thou oversize(Rings included).
This piston has a possible compression ratio of 10.3:1 as fitted to Cooper RSP 1990.Engine then becomes 1310cc
Current pistons differ from the 60s origi...
Timing cover front plate and tensioner plate bolt and washer kit. Comes with all parts to fit the cover except for the counter sunk screws if fitting a duplex kit (our duplex kits all come with these).
You should replace the camshaft bearings every time the block goes to the machine shop. These bearings fit all late model 1275cc blocks (the ones without tappet covers on the back) It's almost too simple and thus often overlooked during a rebuild. Ca...
Mini Spares best quality complete gasket and seal kit for engine block and gearbox,for all common engine types and sizes.
Also comes complete with Mini Spares Evolution clutch oil seal 13H2934MS, differential oil seals...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
Race quality heavy duty double row performance endless timing chain. It is the best chain available and used by top engine builders, also fits MGB/Midget. This chain is for duplex gears that is used by racers as a limited stretch heavy duty version m...
Special superb extra strong timing chain with very limited stretch using modern day materials and technology to keep your timing correct and will fit any A series engine using a single row chain.
This chain saves all the time and effort requ...
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