MAHLE 197836025 SBC 374ci Forged 2618 Dome Piston Set 4.125 Bore 13.6:1 CR

The MAHLE 197836025 is a complete forged piston and ring kit engineered for Small Block Chevy (SBC) 23-degree dome applications. Designed for a 374 cubic inch displacement, this set delivers the precision and durability required for high-performance and racing engine builds.

Key Features:

• Forged 2618 Aluminum Alloy — Low-expansion, high-strength alloy formulation ideal for boosted, nitrous, and all-out race applications
• Gasported Design — Small gas ports around the top ring land improve ring seal under high cylinder pressure for maximum power
• Asymmetrical Valve Pockets — Precision-machined to clear intake and exhaust valves while maximizing compression ratio
• Anti-Friction Skirt Coating — Factory-applied coating reduces piston-to-wall friction and drag, improving durability during break-in and beyond
• Phosphate Coating — Applied to ring grooves and pin bores to prevent micro-welding and galling, especially during initial engine start-up
• Slipper Skirt Forging — Lightweight, low-drag design superior in strength-to-weight ratio compared to traditional full-round skirt designs
• Complete Kit — Includes 8 pistons, a 1.0mm / 1.0mm / 2.0mm file-fit performance ring set, wrist pins, and wrist pin retaining clips

Specifications:

• Engine Family: Small Block Chevy (SBC) 23° Dome
• Displacement: 374 cubic inches
• Bore: 4.125"
• Stroke: 3.500"
• Rod Length: 6.000"
• Compression Height: 1.250"
• Dome Volume: 12.0cc
• Pin Diameter: 0.927"
• Piston Weight: 482 grams each
• Compression Ratio: 13.6:1 (64cc chamber) / 12.5:1 (70cc chamber)
• Piston-to-Wall Clearance (over coating): 0.0055" – 0.0063"
• Ring Thickness: 1.0mm x 1.0mm x 2.0mm (File Fit)
• Material: 2618 Aluminum Alloy

MAHLE Motorsport ProSeries pistons are race-proven components trusted by professional engine builders across drag racing, circle track, and endurance competition. This complete drop-in assembly is fully prepped and ready to install — simply file the ring gaps to specification and assemble.