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Product Details

Universal performance parts brand accessories

FHR Series Pistons by Icon Pistons®. United Engine & Machine's Icon piston line is engineered from the ground up for extreme high performance street or racing applications. We're putting a century of piston design and experience into every Icon piston and it shows. No matter your high performance application, there is an Icon piston for you.

Icon Pistons

Specifications:

Bore: 4"
Compression Height: 1.280"
Effective Head Volume: 24cc
Ext. Valve Depth: 0"
Ext. Valve Diameter: 0"
Head Type: Dish
Int. Relief Depth: 0"
Int. Relief Diameter: 0"
OE Deck Height: 9.500"
Pin Diameter: 0.927"
Rod Length: 6.200"
Stroke: 4"
Top Land: 0.285"
Gram Weight Piston Pin: 452/132
Compression Ratios: 54-10.6, 58-10.1, 64-9.6
Lock Ring: LR912A
Pin Number: .927"x2.750"
Ring Packs: 1/16, 1/16, 3/16
Ring Set: 4000BD8

Features:

  • High ductility 2618 alloy
  • Dual forced pin oiling on most applications
  • Lateral gas porting on higher compression ratios
  • 1.5 x 1.5 x 3.0mm ring packs
  • 1/16" x 1/16" x 3/16" ring packs standard
  • Fully machined with deep valve pockets
  • Second land accumulator grooves
  • Top land mini groove technology
  • Diamond finished skirts
  • Triple wound spiral locks
  • Spacer rings included in short compression heights that intersect the wrist pin bore
  • Over 100 applications on the shelf
  • Over 360 different part number oversizes
  • Available in kits with rings

United Engine & Machine's Icon piston line is engineered from the ground up for extreme high performance street or racing applications. We're putting a century of piston design and experience into every Icon piston and it shows. No matter your high performance application, there is an Icon piston for you.

United Engine and Machine Company was started in 1922 in Fresno, California, by Deuta Sulprizio, Sr. For almost a century, the company has been building a strong reputation for the manufacturing of high-quality pistons. Today's United Engine & Machine Icon Piston® line is engineered from the ground up for extreme high performance street or racing applications. The company is putting a century of piston design and experience into every Icon piston and it shows. Each Icon piston is forged from high-strength, heat treated, 2618 aluminum alloy. This makes them significantly lighter than the competition's equivalent products, without sacrificing strength. No matter your high performance application, there is an Icon piston for you.

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