Wiseco Subaru EJ257 Piston Set, 99.50 mm Bore, 30.70 mm Compression Height, 0.9055 in. Pin Diameter, Sport Compact, Set of 4.
Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco’s Professional Series.
- Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
- ArmorGlide® Skirt Coating: seizure resistant, friction reduction, and quieter operation
- Fully machined crown features
- Precision ring grooves, anti-detonation groove, and additional ring seal improving features
- Forced pin oiling
- Designed and built to withstand heavy to severe duty performance applications
| Product Series | Professional |
|---|---|
| Bore Diameter | 99.50 MM |
| Compression Height | 30.70 MM |
| Piston Volume | -19.00 CC |
| Piston Material | 2618 |
| Skirt Coating | Yes |
| Forging Type | Strutted |
| Piston Quantity | 4 |
| Ring Set Included | Yes |
| Top Compression Ring Thickness | 1.2 MM |
| Second Compression Ring Thickness | 1.5 MM |
| Oil Ring Thickness | 2.0 MM |
| Wrist Pin Included | Yes |
| Wrist Pin Material | 9310 |
| Wrist Pin Outer Diameter | 0.9055 IN |
| Engine Detail | Subaru EJ257 |