
4P Pro TSX Cylinder Head
Includes : 4 Piston Pro TSX Cylinder head (no core required) Ferrea 6000 valves 4P high performance spring kit Ferrea locks Viton valve seals Jet wash/soda blasted Assembled CNC Ported intake and exhaust ports OEM Guides left in for porting Precision CNC valve job using the latest NEWEN Fixed Turning technology Resurface Features and Benefits : The RBB TSX heads have the smallest port and least material available for machining when compared to the other K-Series castings. This port was designed to fit in this casting, and takes a mediocre 275cfm cylinder head and transforms it into a 340+cfm race winner! Slow-cut precision 5-axis cnc porting, second to none on machining quality. 45 degree valve job designed for long life and durability. Unique power producing exhaust port design. Smaller intake port volume, high air speed port design. Optional full length bronze manganese valve guide for valve stability. Port walls are left extra thick for high boost applications when used in ot