These might be the nicest pistons we have gotten our hands on. We are really impressed by the quality of the build. These pistons require notching the piston and moving the oil squirter to the side for clearance. We can also have these pistons cut to clear HKS Step2 V-Cam. . . . 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.Performance coatings include a phosphate dry lubricant that is used to protect against ring micro-welding and pin galling during initial startup and break in. For added performance, MAHLE applies its proprietary Grafel anti-friction coating to each piston skirt. Specifications More Information Note Must check oil squirter clearance, possible modification needed. PowerPak Plus 2618 Alloy & Hard Anodized Top Ring Groove For Extreme Duty Applications Item Weight 366 g Shipping Weight (Dimensional) 6.1700 Part Type Pistons Make Nissan / Infiniti Vehicle Model Skyline GT-R R32 R33 R34 Vehicle Group Skyline GT-R 89-94 R32, Skyline GT-R 95-98 R33, Skyline GT-R 99-02 R34 Engine RB26DETT Compression Ratio 8.5:1 Bore Diameter 86.5mm Pin Size 0.827" / 21mm Head cc 65 cc Dome cc 16 cc Compression Height 1.190" / 30.25mm Piston Coating Skirt Coating Manufacturer Mahle Stroke 73.7mm Skirt Type Slipper Skirt Rod Length 4.783" / 121.5mm Piston Material 2618 Compression Ratio Range 8.0:1 - 9.0:1 Bore Oversize 0.020" / 0.5mm Engine Head RB26DETT Rod Length Oversize Standard Length Carb Legal Unspecified Stroke Oversize Standard Product Flags N/A