Wiseco GLS17 Dimpled Oil Rail Support 3.293-3.367 in. Bore

The Wiseco GLS17 Dimpled Oil Rail Support is a precision-engineered piston component designed for high-performance automotive engine builds. Oil Rail Supports (ORS) are essential in applications where the piston pin bore intersects the oil ring groove ? a common condition in pistons with reduced compression heights, such as those found in long-stroke or long-rod engine configurations.

Without an oil rail support in place, the lower oil ring rail can protrude through the wrist pin opening, leading to oil control failure and potential engine damage. The GLS17 fills that gap, providing a solid landing surface for the oil ring assembly throughout the full operating range of the engine.

Key Features:

• Dimpled anti-rotation design ? The precision dimple locks into the void in the wrist pin bore to prevent rotation during engine operation
• Spring steel construction ? Manufactured from durable spring steel and installed against the bottom sill of the oil ring groove
• Bore-specific fit ? Sized to match the specific bore diameter of compatible Wiseco pistons for a secure, proper fit
• Compatible with 0.030" wider grooves ? Designed for use only in pistons where the oil ring groove has been machined 0.030 inches wider than the oil ring itself
• Shelf stock availability ? Available as an individual replacement component for engine rebuilds and performance builds
• Sold individually ? one (1) oil rail support per package

During installation, the dimple must be oriented downward and positioned over the wrist pin bore, which naturally places the end gap 90 degrees from the wrist pin. Always confirm specifications against your piston's spec card before assembly. Note that Wiseco catalogs list sizes in inches while packaging may reference millimeters ? verify bore diameter prior to ordering.