Speedmaster PCE281.2013 CNC Aluminum Cylinder Heads Small Block Chevy 350 217cc 68cc Angle Solid Flat Tappet

The Speedmaster PCE281.2013 is a complete assembled aluminum cylinder head designed for Small Block Chevy 350 engines running solid flat tappet camshafts. These CNC-machined performance cylinder heads feature 217cc intake runners and 68cc combustion chambers, engineered to deliver improved power throughout the RPM range with enhanced throttle response and top-end horsepower.

Key Features:

• 217cc intake runner volume for excellent airflow
• 68cc combustion chamber volume
• CNC-machined combustion chambers, intake ports, and exhaust ports for consistent performance
• Angled spark plug design (23-degree valve angle)
• 2.020" intake valves and 1.60" exhaust valves (both +.100" length)
• Complete assembled heads with valves, springs, retainers, locks, and seals installed
• Maximum valve lift: .650"
• Dual valve springs with 210 lbs closed seat pressure and 450 lbs open seat pressure
• Natural aluminum finish

Speedmaster CNC cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and repeatability, eliminating the variations found in hand-ported heads. The precision-machined combustion chambers offer superior control over flame travel and quench area, while the fully CNC-machined intake and exhaust ports deliver optimized flow and velocity. Sold as individual cylinder heads.