FHR Pistons & Ring Set
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.
Part Type: Pistons
UPC: 800745158697
Piston Rings Included: Yes
Bore (mm): 108.966
Bore (in): 4.290"
Stroke: 4.250"
Piston Style: Flat Top, with single valve relief
Rod Length: 6.385"
Piston Material: Forged Aluminum
Piston Head Volume (cc): +3.00
Compression Height (in): 1.270"
Wrist Pin Style: Press-fit or floating
Pin Diameter (in): 0.990"
Wrist Pin Included: Yes
Piston Ring Thickness: 5/64" x 5/64" x 3/16"
Gapless: No
File Fit: No
Oil Ring Tension: Standard
Oil Ring Material: Stainless Steel
Oil Ring Thickness: 3/16"
Top Ring Thickness: 5/64"
Top Ring Material: Iron
Top Ring Facing Material: Moly
Second Ring Material: Iron
Second Ring Thickness: 5/64"
Second Ring Facing Material: Cast Iron
Remanufactured: No
Notes: Spacer Ring Included.
Quantity Sold as: Set of 8 |