FORGED 82.5mm piston set made for the Audi and VW 1.8T engine using 92.8mm Crankshaft from Mk4 2.0L/Mk5 2.0t.(Mk4 2.0 block can also be used) 9-1 cr. Set of 4 pistons with rings, wrist pins and circlips. Uses 20mm wrist pins for a perfect match to Our #105.100 H Beam Forged Connecting Rods. Made from high silicon enhanced 4032 alloy that has lower thermal expansion. Offset wrist pins for quieter operation. Cold extruded chrome moly steel wrist pins. Phosphate dry.