Engine | Pistons | Cams, lifters, timing chains

All Cooper S and 1275cc available in standard, +20, 40, and 60
ALL 8.1cc dish Part Number Price

AE 8.8CR
AE 9.4CR
AE 9.75CR
P21251
P21250
P21253
$62.50 ea
$79.95 ea
$91.95 ea

P21253 can "pop up" on early and heavily decked blocks.The different cr’s are achieved by different pin to crown heights, with 21.4cc cyl. Head chamber size. The P21253 pistons are the best for high performance use. They have a much smaller oil drain slot behind the oil control ring, thereby reducing the possibility of breakage.

POWERMAX 73.5mm - DISH

P20659 $495.00
These Powermax 73.5mm pistons were designed specifically to make a 1380cc motor out of your A -series block. 9cc dish, 1.481" compression height allows the engine builder the opportunity to build a 9.6 to 1 big bore motor.
Mega Performance Pistons
1275cc
available in +20, 40, and 60
Part Number Price

6.5cc Dish
Flat Top

1380
7cc Dish
11cc Dish

C-AJJ3378
C-AJJ3382


C-STR310
C-STR312

$579.95 set
$579.95 set


$579.95 set
$579.95 set


Please inquire regarding small bore pistons.

 

 
Parts Home