The BOLT4 is a 16 valve L4 engine. It utilizes the Suzuki Hayabusa head and incorporates race car features such as a high capacity alternator, flywheel with an automotive race clutch, adapter for Hewland and other gearboxes, robust crankshaft, advanced dry sump oiling system and low crankshaft center height.

 

See BOLT 4 Specs page for details (CLICK HERE!)

Find the full Dossier on the Bolt HRC-4 I4 Turbo in issue 122 of Race Engine Technology magazine.