Wiseco PTS532A55 Pro Tru Street Forged Piston Set Chrysler 440 Stroker 4.375 Bore

The Wiseco PTS532A55 is a Pro Tru Street forged piston set engineered for Chrysler 440 big block stroker applications. Displacing 499 cubic inches with a 4.375 in. bore and 4.150 in. stroke, this flat-top piston set delivers the durability and precision of a competition-grade forging at a street-build price point.

Kit Specifications:

• Bore: 4.375 in.
• Compression Height: 1.850 in.
• Pin Diameter: 0.990 in.
• Stroke: 4.150 in.
• Rod Length: 6.760 in.
• Piston Volume: -6.3cc (Flat Top)
• Compression Ratio at 78cc Chamber: 11.6:1
• Compression Ratio at 88cc Chamber: 10.6:1
• Included Ringset: S100S8-4375-5
• Replacement Piston P/N: 5532A55

Key Features:

• 4032 Forged Aluminum Construction: Forged in Mentor, Ohio for superior strength and dimensional consistency
• ArmorGlide® Skirt Coating: Seizure-resistant, friction-reducing coating that allows tighter bore fitment, improved ring seal, and quieter operation
• Flat-Top Design with Valve Pockets: As-forged dome with oversized, symmetrical, radiused valve pockets for maximum flow and compatibility with OEM and Indy cylinder heads
• All-Inclusive Kit: Includes pistons, rings, wrist pins, and clips — everything needed for a complete rebuild

The PTS532A55 is designed for use with OEM and Indy cylinder heads on the Chrysler 440 platform with a 4.150 in. stroker crank. Whether building a spirited street engine or a budget-friendly performance motor, this Pro Tru Street kit provides forged quality with a straightforward, complete package.