JE ULTRA -5cc Flat Top Pistons (4.000 Stroke, 6.125 Rod, 4.070 Bore) 360772

Product Code: 360772
Availability: Pre-Order
$1,274.47 $1,348.64

Available Options

GM LS Flat Top Our brand new Asymmetrical FSR (Forged Side Relief) forging design allows for the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearance problems. Asymmetrical forging design maintains a larger skirt on the heavily stressed major thrust side, while reducing friction with a smaller skirt on the minor thrust side. The result is a high strength, lightweight piston that significantly reduces friction in your engine. Lightweight and extremely durable, these pistons are machined for 1.2mm, 1.5mm, 3.0mm rings.

Ultra Series Includes:
Grain Flow Optimized Forging
Lateral Gas Ports
Ceramic Crown Coating
Perfect Skirt Coating
Accumulator Groove
Double Forced Pin Oiling
Upgraded 9310 Pins and locks

Rings Sold Separately Option to add JG31F8-4070-0 +$150  (4.070 Bore, File Fit, 1.2, 1.5, 3mm Ring Pak, Low Tension Oil Rings) 


Bore Size
4.070
Crankshaft Stroke
4.000
Rod Length
6.125
Piston Type
-5cc Flat Top 
Compression Height
1.115
Piston Material
2618 Forged 
Piston Ring Size

> 1.2mm, 1.5mm, 3mm Rings (NOT Included) 

> Oil Rail Supports are Included

Wrist Pin Size
.927 Pins
Valve Pocket Combination 12 degree (LS7 only) and 15 degree Valve Pockets

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