Wiseco 4147FSX 4.147 in. Bore Forged Flat-Top Piston

The Wiseco 4147FSX is a forged aluminum performance piston engineered for high-output automotive applications requiring a 4.147-inch bore diameter. Built on Wiseco's decades of motorsport expertise, this flat-top forged piston is designed to deliver superior strength, precise tolerances, and lasting durability in demanding street and performance engine builds.

Wiseco forged pistons are manufactured using advanced 3D computer-aided design and finite element modeling, resulting in an optimized strength-to-weight ratio that outperforms cast alternatives. The forging process aligns the grain structure of the aluminum alloy to the shape of the part, producing enhanced mechanical properties and superior resistance to impact and fatigue.

Key Features:

• 4.147-inch bore diameter for precision fitment in compatible engine applications
• Flat-top crown design for efficient combustion chamber geometry and improved compression consistency
• Forged from high-strength aerospace-grade aluminum alloy for maximum durability
• Engineered using 3D CAD design and finite element modeling for optimized strength-to-weight ratio
• Tighter manufacturing tolerances compared to OEM cast pistons
• Designed to support power-adder applications including forced induction and nitrous oxide
• Machined valve pockets for proper valve-to-piston clearance in performance builds
• Made in the USA at Wiseco's Mentor, Ohio facility

The Wiseco 4147FSX is an ideal choice for engine builders seeking a reliable, high-performance forged piston solution. Always verify bore size, compression height, and piston-to-wall clearance specifications against your engine's requirements before installation. Professional installation by a qualified engine builder is recommended.