Pistons & Liners

Listed here are the engine sizes along with the model and chassis range they were originally fitted to. Please note that many earlier 4.25 litre engines have been replaced by 4.5 litre engines and that many 4.5 litre engines have been machined out into 4.9 litre. Prior to ordering replacement pistons we recommend that you confirm the bore size and piston part numbers in your engine. 

  4.25 Litre Engine 4.5 Litre Engine 4.9 Litre Engine
Silver Dawn SBA-SD SFC onwards  
Silver Wraith WTA1-WME96 WOF1-ELW63 ELW64 onwards
Mk VI B2AK-B401LH B2MD onwards  
R-Type   B2MD onwards  
R-Type Continental   A, B & C series D & E series

  4.25 Litre Engine 4.5 Litre Engine 4.9 Litre Engine
Bore 3.500" (88.9mm) 3.625" (92mm) 3.750" (92.25mm)
Cubic Capacity 260 cu.ins (4257cc) 279 cu.ins (4566cc) 298 cu.ins (4887cc)