JA piston feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance . This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances.
The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent “hot spots” on piston crowns.
Additional Information:
Hi-tensile forged, not cast, billet material (4032 or 2618).
Optimized crowns for efficient combustion.
CNC machined working surfaces.
Custom piston:JAmodifed can produce pistons for almost all engines. If the parts you need are not within our standard, or you need pistons with different configurations, please fill in the CUMSTOM FORM and check PISTON CATALOG, we will have a design engineer to measure for you Customized.
See Other Pistons:
Ford-Focus:Bore 3.444-Pin Size 0.826-CR 10.0:1
Ford-Small Block N351:Bore 4.03-CH:1.25-Pin Size 0.927-CR 11.6
Ford-Small Block All 20°:Bore 4-CH:1.6-Pin Size 0.912-CR 9