Wiseco Groove Lock Spacer - 3.894-3.950inch bores Oil Rail Support Shelf Stock

Wiseco has been making high-performance forged pistons for over 80 years, born from a passion for racing. Now, they bring that same focus on precision to their Groove Lock Spacers, like this GLS41 model. This spacer is designed to work with oil rail support shelf stock and fits bores ranging from 3.894 to 3.950 inches.

Each Wiseco Groove Lock Spacer is forged and machined in the U.S.A. at their Mentor, Ohio facility, using advanced equipment. This ensures a well-built part that meets the standards Wiseco is known for in demanding engine applications. It’s a solid option for engine builds where precise component fitment is critical.