... .Min quality:300sets4.material:cast , steel,nodular ironBMW PISTON RING1) Product: audi series PISTON RING2) Dia. :82.5MM(4.6.8CYL).3 ... 't find the product you want,we can manufacture the piston ring according to your sample or product draft. YOU CAN ... OR EMAIL TO US . Vento,passat,80,80Quattro,90.100 piston ring audi2.5ZE,1984cm3