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Stock 72mm Piston Assembly with 18mm Wrist Pin
70mm +2mm(.080") Factory Stock Piston with 18mm Wrist Pin
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Stock 72mm Piston Assembly with 18mm Wrist Pin

Part Number: 172F-12400-K
Online Price: $34.99
72mm Stock Flat-Top Piston Assembly for Wildcat 240 & 72mm Clone Engines
Availability: In Stock.

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Description

72mm Stock Flat-Top Piston Assembly for Wildcat 240 & 72mm Bore Clone Engines


Upgrade your engine performance affordably with this 72mm stock factory flat-top piston assembly, designed specifically for the Wildcat 240 and other compatible 72mm bore clone engines. Ideal for cheater-stock, claimer, or budget performance classes, this piston provides increased displacement without the need for expensive billet rods or specialty components.


Featuring the standard 18mm (.709-inch) diameter wrist pin, this piston works seamlessly with many factory-cast connecting rods as well as stock-style billet or forged rods, offering great versatility and easy installation.


Why Choose This 72mm Piston?

  • Stock flat-top design for reliable combustion and OEM performance
  • 72mm bore size (70mm +2mm/.080 over) increases displacement cost-effectively
  • Compatible with a wide range of factory rods and aftermarket billet/forged rods
  • Perfect for racing classes that require near-stock components but seek a performance edge


Piston Specifications:

  • Piston Weight: 158g
  • Piston Assembly Weight: 226g
  • Compression/Pin Height: 0.904 inch (wrist pin centerline to piston crown)
  • Piston Diameter: 72mm (2.8345 inch)
  • Piston Skirt Length: 1.695 inch

Piston Ring Specifications:

  • Top Ring: 1mm
  • Second Ring: 1mm
  • Oil Ring Pack: 2.5mm

Wrist Pin Specifications:

  • Diameter: 18mm (0.7075 inch)
  • Pin Wall Thickness: 0.095 inch
  • Pin Length: 2.1065 inch


This 72mm piston assembly offers a cost-effective upgrade path for Wildcat 240 owners and clone engine builders seeking more power with stock-style reliability. Boost your engine displacement and maintain compatibility with readily available rods and components.

FAQ

Q1: What engines is this 72mm piston assembly compatible with?
A: It fits the Wildcat 240 and other 72mm bore clone engines that use standard 18mm wrist pins.

Q2: What wrist pin size does this piston use?
A: The piston uses a standard 18mm (.709-inch) diameter wrist pin, compatible with many factory rods.

Q3: Is this piston suitable for racing?
A: Yes, especially for cheater-stock or claimer classes where increased displacement is allowed but billet rods or specialty pistons are not.

Q4: What are the piston ring sizes?
A: Top and second rings are both 1mm, and the oil ring pack measures 2.5mm.

Q5: What is the piston compression height?
A: The compression (wrist pin centerline to piston crown) is 0.904 inches.

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