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Ultra Series forged pistons from JE are the industry’s strongest, most fully featured pistons available off the shelf. Offered for LSX 12 and 15 Degree Engines. 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 the following custom level features
JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE Pistons 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.
| 2nd Groove Width | 0.06 in |
|---|---|
| 3D Undercrown Milling | No |
| Accumulator Groove | Yes |
| Anodize Top Ring Groove | No |
| Bore Diameter | 4.065 in |
| Combo 2 | No |
| Compression Height | 1.304 in |
| Compression Ratio | 10.90:1 / 64.00 CC Head |
| Connecting Rod Length | 6.125 in |
| Contact Reduction | No |
| Country Of Origin | USA |
| Cylinder Head | LS 12 DEG/15 DEG COMBO VR |
| Deck Height | 9.240 in |
| Double Pin Oilers | Yes |
| DVGP | No |
| Econo Undercrown Milling | No |
| EN Plating | No |
| Engine | LS3 |
| Engine Displacement | 376 cid |
| Engine Family | LS |
| Engine Stroke | 3.622 in |
| Engine Type | ICE |
| Exhaust Angle | 12 |
| Exhaust Depth | S |
| Exhaust Diameter | 2.000 |
| Forging Type | FSR |
| Gas Distribution | No |
| Intake Angle | 12 |
| Intake Depth | .235 in |
| Intake Diameter | 2.450 in |
| Lateral Gas Ports | Yes |
| Make | Chevrolet |
| Mill Undercrown | No |
| OEM Bore Diameter | 4.065 |
| Oil Groove Width | 0.11750 in |
| Oil Ring Thickness | 0.1175 in |
| Oversized | No |
| Oversized Amount | Standard |
| Pin Fit | Yes |
| Piston Head Type | Flat |
| Piston Material | 2618 |
| Piston Series | JE Ultra Series |
| Piston Sub-Series | LS Flat Top |
| Piston To Wall Clearance | -0.0045 in |
| Piston Volume | -5.00 cc |
| Pro Seal Head Gasket | GM1006-051 |
| Product Market | Domestic |
| Product Type | Engine Piston Kit |
| Ring Set - Recommended | JG31F8-4070-0 |
| Ring Set Included | No |
| Ring Set Thickness | 1.20 MM x 1.50 MM x 3.00 MM |
| Second Compression Ring Thickness | 0.0600 in |
| Skirt Coat | Yes |
| Smooth Crown Finish | No |
| Thermal Crown | Yes |
| Top Compression Ring Thickness | 0.0475 in |
| Top Groove Width | 0.04750 in |
| Tuff Skirt | No |
| Ultra Dome | No |
| Ultra Groove | No |
| Ultra Groove Plus Gas Port | No |
| Vertical Gas Ports | No |
| Wrist Pin Included | Yes |
| Wrist Pin Length | 2.250 in |
| Wrist Pin Material | 9310 Nickel Carbon Steel Alloy |
| Wrist Pin Outer Diameter | 0.927 in |
| Wrist Pin Part Number | 927-2250-15-51C |
| Wrist Pin Retainer Included | Yes |
| Wrist Pin Retainer Part Number | 927-073-MW |
| Wrist Pin Wall Thickness | 0.200 in |
30 Months
WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
California carb status to be completed
CLOSE ✕
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