Manley Performance Chevrolet Small Block 4.040-inch Bore 1.280-inch Compression Dome Platinum Series Pistons Part Number 591740-8

Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability. Manley Piston Set, PIST-4.040/1.280CD/FT.

• Chrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with our Standard Series Pistons. For select SKUs, we offer wrist pin upgrades to 9310 and Turbo Tuff/DLC alloys, providing additional durability.
• Unique Fixturing: Manley's unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.
• Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.
• Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.
• 2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.

Upgrade your engine with the Manley Performance Platinum Series pistons designed specifically for Chevrolet small block engines. Crafted from high-strength 2618 alloy forgings, these pistons deliver exceptional durability and performance under demanding conditions. The precise cam and barrel (skirt) profiles generate substantial power while minimizing cylinder wall wear, making them ideal for high-performance applications. Each piston features meticulously machined ring lands and grooves that enhance sealing efficiency, leading to improved compression and overall engine power. The combination of premium materials and advanced manufacturing techniques ensures reliable operation and longevity in your engine build.
Manley Pistons come equipped with chrome moly wrist pins as standard, providing excellent strength and reducing the risk of failure. For enhanced durability, select variants are available with upgraded wrist pins made from 9310 steel or Turbo Tuff/DLC coatings, catering to high-stress racing or forced induction setups. Unique fixturing during manufacturing allows for single-operation skirt turning and ring groove machining, ensuring perfect squareness and consistent ring sealing. This precision manufacturing results in a superior fit and finish that promotes optimal piston performance.
Designed for serious enthusiasts and professional engine builders, these pistons meet rigorous standards for ring land and groove dimensions, optimizing ring seal and contributing to increased horsepower. The Platinum Series pistons are compatible with a variety of high-performance modifications and provide a reliable foundation for power upgrades. Please note that these pistons are not carb-approved and require acknowledgment of Prop 65 regulations. Whether you're building a custom race engine or upgrading your daily driver, the Manley Performance Chevrolet Small Block Pistons offer a combination of strength, precision, and performance that is trusted by industry professionals.

Features:

• 2618 alloy forging: Ensures superior strength and durability for high-performance engines

• Cam and barrel (skirt) profiles: Designed to generate power while protecting cylinder walls

• Chrome moly wrist pins: Standard with options for upgraded steel or coated variants for increased durability

• Precise machining: Unique fixturing guarantees perfect ring land and groove squareness

• Exacting ring lands and grooves: Improve ring seal and engine compression

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1