BBCRACE20XCNC485CC2.420X1.800 BARE

These Dart Pro 1 CNC Ported, 360 BBC Cylinder Heads are designed for high-performance Big Block Chevy (BBC) engine builds. Borowski Race Engines, a reseller, custom-machines these heads from porter castings on their own CNCs to achieve superior flow and horsepower compared to standard Dart machined heads. The port designs are continuously optimized. These assembled heads are available for both hydraulic and mechanical cam applications. The mechanical cam version features Dart Severe Duty stainless steel intake valves and Dart Inconel exhaust valves. The hydraulic cam version utilizes Manley Severe Duty valves. Both configurations include Manley spring kits with 10-degree hardened steel locks and titanium retainers.