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Product Details
FHR Series Hollow Dome Piston & Ring Kit by Icon Pistons®. Each Icon piston is forged from high-strength, heat treated, 2618 aluminum alloy. This makes Icon pistons significantly lighter than the competition without sacrificing strength. Our lightweight design will allow your engine to rev quicker and get into it's power band faster. The V-rib design promotes maximum piston cooling. 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.
Specifications
| Bore Size: 4.250" |
| Bore Size (mm): 108.00 mm |
| Compression Height (in): 1.395" |
| Crown Type: 0.425" Dome 1V |
| Int Valve Depth/Dia (in): 0.275-2.420" |
| Ext. Valve Depth/Dia (in): N/A |
| Crown (cc): -38.00 cc |
| Intake Relief Depth: 0.275" |
| Intake Relief Diameter: 0.275" |
| Intake Relief Diameter: 2.420" |
| Lock Ring: PRG110-3 |
| Material: Forged |
| OE Deck Height: 9.800" |
| Oversize: 0.070" |
| Pin Diameter (in): 0.990" |
| Pin Diameter (mm): 25.10 mm |
| Pin End Bore Diameter: 0.990" |
| Piston Ring Size: 2-1/16, 1-3/16 |
| Ring Set: 4250BD8 |
| Rod Length (in): 6.385" |
| Rod Length (mm): 162.00 mm |
| Stroke (in): 4.000" |
| Stroke (mm): 101.60 mm |
| Top Land (in): 0.360" |
| Weight (g): 620/141 g |
| Alloy: 2618 |
| lock: PRG110-3 |
| Pin Number: 0.990x2.750 |
| Pin Type: Press or Floating |
| Compression Ratio @ 119cc: 11.4 |
Includes
- 1 Set PN # IC991.070
- 1 Set PN # 4250BD8.070
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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Quality
Posted by Ronald (Boylston, MA) / April 21, 20181966 Chevy Corvette
Questions and Answers
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