Icon FHR Pistons & Ring Sets
FHR- Formed Head Relief pistons have valve reliefs that are formed in as the piston blank is pressed into the die. Many of the domed models are solid which allows tailoring the dome height for a specific compression ratio. The 4032 Alloy material has 11% silicon content which controls the thermal expansion so a tighter piston to wall clearance may be used over the 2618 alloy. The additional silicon will also increase wearability on the skirts and pin bores making this an ideal material for street and light boosted applications. Mini grooves allow an overheated piston that contacts a cylinder wall to transfer heat to the wall. Friction is also reduced over a solid land. Press or bushed connecting rods may be used as all applications come with lock rings. Piston & Ring Sets also include a set of premium moly piston rings. Most available in std., 0.030", 0.040", and 0.060" over sizes. Sets of 8.
- Formed Head Relief Design
- 4032 Alloy Forgings
- Die Formed Valve Reliefs
- CNC Machined Skirts
- Top Land Mini Groove Technology
- Second Land Accumulator Grooves
- M42 Skirt Coating
- Heavy Duty Pins & Lock Rings Included
- Piston & Ring Sets also Included a Set of Premium Moly Rings
Part Type: Pistons
UPC: 800745157331
Piston Rings Included: Yes
Bore (mm): 109.474
Bore (in): 4.310"
Stroke: 4.000"
Rod Length: 6.135"
Piston Material: Forged Aluminum
Piston Style: Dome, with single valve relief
File Fit: No
Piston Ring Thickness: 5/64" x 5/64" x 3/16"
Pin Diameter (in): 0.990"
Wrist Pin Included: Yes
Wrist Pin Retainers Included: Yes
Wrist Pin Style: Press-fit or floating
Compression Height (in): 1.645"
Piston Head Volume (cc): -18.30
Gapless: No
Top Ring Material: Iron
Top Ring Thickness: 5/64"
Top Ring Facing Material: Moly
Second Ring Thickness: 5/64"
Second Ring Material: Iron
Second Ring Facing Material: Cast Iron
Oil Ring Tension: Standard
Oil Ring Material: Stainless Steel
Oil Ring Thickness: 3/16"
Remanufactured: No
Note: Closed chamber cylinder heads.
Quantity Sold as: Set of 8 |