Forged piston set 81mm 1.8L 20V VW/AUDI

For VW/AUDI 1.8 20V engines Nominal bore diameter: 81mm (increase engine displacement to 1780cc) Recommended bore to piston to bore clearance: 0.08mm (For nitrous or extreme applications, consult your builder) Piston ring grooves: 1.5 mm / 1.5 mm / 2.0mm Compression height: 32.70mm. Dish volume: 7cc Compression ratio: 8.5:1 Pin offset: 1.10mm. Material: Forged aluminum 4032 T6. Average piston weight (unit, without pin): 318,66g (11.2 oz). Rated for 1000hp. Innovative high performance piston skirt design that provides: 1. Smaller piston to bore clearance  2. Less noise 3. Better ring seal 4. Higher power 5. Durability Features: Anti detonation grooves: protect the top ring by disrupting detonation waves and reduce piston-cylinder contact in high temperatures and engine RPM conditions. Accumulator groove: accumulates residual combustion gasses reducing top ring flutter and improving seal. Pin oil lubrication by broaches and oiler to reduce friction and increase durability. Sup