The Mahle PowerPak Plus is a complete, race proven piston assembly kit.
It is composed of hand deburred, forged, performance coated pistons, high quality steel pins, round wire locks and low drag performance file fit rings.
Make Subaru
Vehicle Model STi
Model STi 04-07 GD, STi 08-14 GR, STi 15+ VA
Engine EJ257, EJ257B
Rod Length 5.137" / 130.5mm
Rod Length Oversize Standard Length
Bore Diameter 99.5mm
Bore Oversize Standard Bore
Stroke 79mm (Standard Stroke)
Compatible with Stock Sleeves Yes
Requires Aftermarket Sleeves No
Compression Ratio 8.5:1
Compression Ratio Range 8.0:1 - 9.0:1
Pin Size 0.905" / 23mm
Head cc 56 cc
Face Type Dish
Dome cc -19.3 cc
Compression Height 1.209" / 30.7mm
Piston Coating Skirt Coating
Skirt Type Slipper Skirt
Piston Material 2618
