Wiseco PTS538A3 Pro Tru Street AMC 360 Forged Piston Set 4.110 Bore -21cc Dish

The Wiseco PTS538A3 Pro Tru Street Piston Set is a complete forged piston kit engineered for the AMC 360 V8 engine. Featuring a 4.110-inch bore and a -21.0cc reverse dome (dish) crown, this set delivers a compression ratio of approximately 9.2:1 with 58cc heads — making it an ideal choice for street performance and mild high-performance builds. Each kit includes 8 pistons, rings, pins, and clips for a complete, all-inclusive engine rebuild.

Key Specifications:

• Bore: 4.110 in.
• Crown Volume: -21.0cc Dish (Reverse Dome)
• Compression Height: 1.590 in.
• Stroke: 3.440 in.
• Rod Length: 5.875 in.
• Pin Diameter: 0.930 in.
• Compression Ratio: 9.2:1 (at 58cc head volume)
• Piston Material: Forged 4032 Alloy Aluminum
• Ring Lands: 1/16 in., 1/16 in., 3/16 in.
• Top Ring: Moly-Faced Ductile Iron
• Second Ring: Phosphate-Coated Cast Iron
• Oil Ring Tension: Standard
• Replacement Ringset: S100S8-4110-5
• Replacement Piston: 5538A3

Key Features:

• ArmorGlide® Skirt Coating — seizure resistant, reduces friction, and promotes quieter operation
• 4032 Forged Aluminum construction for superior strength-to-weight ratio
• AS-Forged dome with crown features and oil drain backs
• Chromium Alloy Steel Piston Pin included with Spirolox® retaining clips
• Compatible with both floating and pressed-fit pin connecting rods
• Engineered, forged, and CNC-machined in Mentor, Ohio, USA

Wiseco's Pro Tru Street series offers race-proven forged piston technology at a street-build price point. This set is built on demand for AMC 360 applications and ships as a complete kit — everything needed is included right in the box.