Wiseco 4037GFX GF-Style Piston Ring Set 4.037 in. / 102.54mm Bore File-Fit

The Wiseco 4037GFX is a GF-Style piston ring set designed for automotive performance applications with a 102.54mm (4.037-inch) bore. Engineered to Wiseco's exacting specifications, this ring set delivers race-proven sealing performance and oil control for high-output engines. Each set covers one piston and features a three-ring configuration built from premium materials throughout.

Key Features:

• Chrome-plated, barrel-faced steel top ring for superior sealing and wear resistance under high-compression conditions
• Taper-faced ductile iron second ring provides excellent oil wiping and compression back-up
• 3-piece oil control ring with a stainless steel spacer and chrome-plated rails for precise oil regulation
• File-to-fit design allows builders to achieve their exact desired ring end gap for optimal performance tuning
• Ring thickness: 1.2mm top / 1.2mm second / 3.0mm oil
• Bore size: 102.54mm (4.037 in.)
• Covers one piston per set — order one set per cylinder

Wiseco ring sets are engineered specifically to work with Wiseco pistons, ensuring precise fitment and optimal ring seal. Whether building a street performance or race engine, the 4037GFX delivers the consistency and durability that engine builders and racers depend on.