Wossner Subaru Impreza WRX STI 2.5 16v Fast Road Forged Piston Kit Bore Size:100.5mm - K9131D100 4mmCompression Height: 34mmOEM Comp Ratio:

4mmCompression Height: 34mmOEM Comp Ratio: 9

Engine Type: 1600 8vBore Size: 82

5 20v TurboBore Size: 83

77mm - K9460DA                   Stroke: 85

Wossner Subaru Impreza WRX STI 2.5 16v Fast Road Forged Piston Kit Bore Size:100.5mm - K9131D100 4mmCompression Height: 34mmOEM Comp Ratio:This Wossner Subaru Impreza WRX STI 2. 5 16v Fast Road Forged Piston Kit includes the following components: 4x Wossner Forged Pistons Piston Rings Pins and Clips Specs: Build years: 2004 2008 Engine Code: EJ257 Engine Type: 2. 5 16vBore Size: 100. 5mm, 100mm, 99. 25mm, 99. 5mm Stroke: 79mmCompression Height: 30. 7mmOEM Comp Ratio: 8. 4: 1Number of Rings: 3Clip Part Number: CW23 Pin Part Number: WP024 Cylinders: 4 Valves Per Cylinder: 4 These pistons