Billet stroker crankshaft for increased displacement and structural integrity

Upgrading to ARP head studs increases clamping force and improves head gasket sealing

5150 AutoSport Pro-Xtreme Forged Pistons by CP-Carrillo for BMW M52 Engines with 135mm Rods

Supertech offers high-performance valve spring kits designed specifically for BMW and Toyota B58 engines

2002-2005     Z4     3

BMW N20 / N26 Valve Springs by SuperTech 1300556 Billet stroker crankshaft for increasedSuperTech High Performance Valve Spring Kit, BMW N20 N26 Valve Spring Kit Supertech valve spring kits for BMW N20 and N26 engines provide unmatched valve control and reliability for high performance applications. Each kit includes premium valve springs, designed specifically for the N20 N26, to meet the demands of enthusiasts and professional racers. Built from top grade materials, Supertech valve springs offer superior spring rates and enhanced