Ultra Series forged pistons from JE are the industry?s strongest, most fully featured pistons available off the shelf. Offered for a wide range of domestic applications from LS to Big Block and HEMI to Ford Modular, Ultra Series pistons feature JE?s proprietary Aligned Grain Flow forging technology providing next-level tensile strength ideal for the extreme cylinder pressures of power adder engine builds. Equipped with custom level features including thermal barrier crown coating, skirt coating, gas ports, and more, Ultra Series are the ideal pistons for your boost-heavy or nitrous-huffing V8 engine build. As with all JE Pistons products, Ultra Series pistons are made 100% in the USA.
Features & Benefits
- Designed for Power: Every feature on Ultra Series Pistons are optimized to perform high-horsepower racing engines
- Aligned Grain Flow Technology: Exclusively available on JE Ultra Series, this proprietary, in-house forging process maximizes tensile strength to withstand the stresses of high-performance engine environments
- Skirt Coating: Reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise, especially on cold start
- Thermal Barrier Crown Coating: This ceramic-based coating reflects heat into the combustion chamber, therefore reducing piston crown temperatures and improving exhaust gas scavenging
- High-Strength Wrist Pins: Premium thick-wall wrist pins are manufactured by Trend Performance in the USA and are designed for the demands of high-performance/power-adder builds
- Lateral Gas Ports: Help maintain power-producing ring seal at the top compression ring, even in high RPM and high boost situations
- Optimized Pin Oiling: Enhanced pin oiling features keep pin, pin bores, and small-end lubricated for reduced heat, friction, and wear
- Made 100% in the USA
Specifications: Piston Set, 2618, Flat Top, 4.035 Bore, 1.000 CD, 0.927 Pin, Set of 8.
JE designs are specifically engineered for extreme upplications up to, and including, professional competition
Detailed Specifications
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Piston Volume: -1.80 cc
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Intake Depth: .280 in.
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Top Compression Ring Thickness: 0.0436 in.
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Top Groove Width: 0.04360 in.
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2nd Groove Width: 0.044 in.
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Second Compression Ring Thickness: 0.0440 in.
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Oil Ring Thickness: 0.119 in.
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Oil Groove Width: 0.11900 in.
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Wrist Pin Wall Thickness: 0.130 in.
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Exhaust Diameter: 1.706
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Wrist Pin Length: 2.400 in.
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Exhaust Angle: 21.5
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Intake Angle: 21.5
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Engine Detail: 23 Degree
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Engine Stroke: 3.500 in.
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Piston Average Weight: 318 g
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Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
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Connecting Rod Length: 6.250 in.
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Forging Type: Round
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Engine: Small Block
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Engine Family: Small Block
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Cylinder Head: STD CHEVROLET 23 DEG
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Accumulator Groove: Yes
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Combo 2: Yes
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Contact Reduction: Yes
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Double Pin Oilers: Yes
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Lateral Gas Ports: Yes
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Pin Fit: Yes
