EJ25 - EXTREME DUTY PLATINUM SERIES TURBO TUFF PISTONS
These come equipped with the 9310 pins (P/N 42546). Premium steel top rings with Napier style second rings and higher tension oil rings for ultimate oil control are included with each set along with round wire locks. Recommended clearance: .003" for mildly boosted and .0035" for highly boosted measured .850" (79/83mm Strokes) and 1.100" (75mm Stroke) from the bottom of the oil ring groove.
Forging
2618 alloy for maximum high temperature strength and fatigue resistance.
Attributes
Contour forgings provide the optimum balance between strength and weight with no grain-interrupting internal milling.
Proprietary multi-step top ring groove machining process assures optimum control of the groove's size, geometry, flatness, and finish.
All final turning is performed in one fixturing resulting in complete squareness of rings to the cylinder wall.
Federal Form-Scan gauging validates ideal skirt indexing to pinhole and skirt-to-skirt polarity.
Added features such as a pressure balance groove included in all series.
Precise pinhole machining results in an exact compression distance as well as precise lock ring groove spacing, size, and concentricity.
Manley Sport Compact Platinum series pistons come complete with pistons, rings, pins, and locks
Specifications
79mm STD Stroke (2.5L)
Bore Size (mm): 100
Over Size: +.5mm
Rod Length: 5.137"
Comp. Distance: 1.209"
Dome Volume (cc): -22
Cylinder Head (cc): 51
Comp. Ratio: 8.5
Piston Type: Dish
Piston Wt / Gms: 412
Included Ring Set: 461000-4
