APT B-Series pistons rings MGB MGA hepolite powermax forged pistons mg

All the pistons listed here for the B-Series engine are for the later engines with 13/16" dia. piston pins, either fully or semi (press fit) floating.

We have a limited number of the earlier pistons available with the pinch bolt type small end, please inquire with your requirements.

For big bore engines the P1900 pistons are the largest that can be fitted and not have the gasket start to hang out into the bore. Bigger than that and the special 86mm gasket, HG-MGB-BB, must be used.
This extra cc is very beneficial, in fact our dyno testing has shown that the power increase is larger than the percentage capacity increase would suggest. I think that unshrouding the valves is where the benefit comes from.
We see this time and time again, to make a B-Series engine go you have to work on the cylinder head flow and then match that with the correct cam and in most cases a higher rocker ratio than stock.

Part Number	Description	Pkg'd	Price US $
P-1900......	Piston, MGB Big Bore 1900cc	EA	$146.70
P-1927......	Piston, MGB Big Bore 1927cc	EA	$146.70
P-1950......	Piston, MGB Big Bore 1950cc (83.5mm bore)	EA	$146.70
P17525-20...	Piston Set, MGB Hepolite +20 Fully Floating, AE	ST	$328.00
P17525-40...	Piston Set, MGB, Hepolite +40, Fully Floating, AE	ST	$328.00
P17525-60...	Piston Set, MGB Hepolite +60, Fully Floating, AE	ST	$328.00
P18802-20...	Piston Set, MGB, Hepolite +20, Semi Floating, AE	ST	$320.00
P18802-40...	Piston Set, MGB, Hepolite +40, Semi Floating, AE	ST	$320.00
P18802-60...	Piston Set, MGB, Hepolite +60, Semi Floating, AE	ST	$320.00

Part Number	Description	Pkg'd	Price US $
R32632......	Rings For P-1950 Pistons (Big Bore MGB)	ST	$129.88
RA21976-20..	Rings For P17525 +20 Pistons	ST	$79.00
RA21976-40..	Rings For P17525 +40 Pistons	ST	$79.95
RA21976-60..	Rings For P17525 +60 Pistons	ST	$79.95
RA25566-20..	Rings For P18802 +20 Pistons	ST	$79.95
RA25566-40..	Rings For P18802 +40 Pistons	ST	$79.95
RA25566-60..	Rings For P18802 +60 Pistons	ST	$79.95

B-Series Pistons & Rings MGB MGA

B-Series Pistons & Rings
MGB MGA