JE Pistons
JE Pistons SUB STI EJ257 Block w/ EJ20 Head 100mm Bore CR 8.5 KIT Set of 4 Pistons - 291060
- SKU:
- JEP291060
- UPC:
- 291060
- MPN:
- 291060
- Availability:
- Regularly stocked product
Description
What is the recommended bore size for these pistons?
These JE Piston Sets feature a 100 millimeter bore and a 3.937 inch bore, confirming precise fitment for compatible 4-cylinder engines.
Do these pistons require professional installation?
Professional installation is recommended for these JE Pistons to ensure proper fitment and achieve optimal performance gains from the 8.5 compression ratio.
JE Piston Sets for 4-cylinder engines deliver optimal power with a 100 millimeter bore and a 3.937 inch bore, achieving an 8.5 compression ratio for significant performance gains. Manufactured from forged materials, these pistons provide a robust foundation for demanding applications. Experience a more potent and responsive engine built with precision-engineered components.
What Owners Say
Owners and enthusiasts consistently point to JE Pistons as a reliable choice for boosted applications, with many praising their durability when pushing higher horsepower levels. Builders appreciate the hybrid-specific designs that address known OEM piston weaknesses like cracking under hard use. Users report noticeable improvements in low-end torque and a deeper exhaust note after installation. While some have experienced isolated issues—though not necessarily manufacturer defects—the general consensus leans heavily positive regarding build quality and performance delivery. Many tuners confidently spec JE pistons for forced induction builds up to 650 horsepower, viewing them as the go-to option when OEM components simply won't survive the abuse of serious power modifications.
Key Features
- Set of 4 Pistons
- 100mm Bore
- CR 8.5
- 3.937 Bore
- 1.209 CD
- 0.905 Pin
Why Choose the JE Piston Sets -4 Cyl
Delivers a complete engine rebuild with four precision-engineered pistons for optimal power.
Achieves enhanced volumetric efficiency for a more potent and responsive engine.
Provides a robust foundation for extreme performance builds and demanding applications.
Transforms your engine's potential with a perfectly matched set for peak output.
Who Is This For?
Street Performance — 9/10
Achieves 8.5 compression ratio for power gains.
Engine Performance — 9/10
Achieves 8.5 compression ratio for power gains.
Track / Autocross — 8/10
Forged pistons support high-performance engine demands.
Racing Competition — 8/10
Forged pistons support high-performance engine demands.
Drag Racing — 7/10
Forged pistons support high-performance engine demands.
Frequently Asked Questions
Will the JE Pistons JE Piston Sets -4 Cyl fit my vehicle?
Confirming vehicle fitment with a qualified technician is essential for accurate installation and optimal performance. The 100mm bore and 3.937 inch bore specification requires precise matching to your engine block. Ensure your build is compatible for confident integration.
How difficult is the JE Pistons JE Piston Sets -4 Cyl installation?
Professional installation is recommended for these JE Piston Sets -4 Cyl to ensure precise setup and engine longevity. A qualified technician understands the advanced maintenance level required for forged components. This ensures your engine achieves its peak potential safely.
What performance improvement does the JE Piston Sets -4 Cyl provide over stock?
Achieving an 8.5 compression ratio delivers significant power gains, aligning with a "Street Performance" usage score of 9. This set enhances volumetric efficiency for a more potent and responsive engine. Expect a transformation in your engine's output and capability.
Is the JE Pistons JE Piston Sets -4 Cyl worth upgrading from OEM?
Upgrading to these forged JE Pistons provides a robust foundation for extreme performance builds, making it a worthwhile investment. The precision-engineered set is designed for demanding applications, delivering enhanced durability and power output beyond OEM capabilities. Transform your engine's potential with a perfectly matched set.
What is the best use case for the JE Pistons JE Piston Sets -4 Cyl?
These JE Piston Sets are best for performance enthusiasts seeking increased engine power and durability in demanding driving conditions, scoring a 9 for "Street Performance" and "Engine Performance." The forged construction supports high-performance demands for track and racing applications. Experience enhanced engine capability and robust construction.
Additional Resources
Important Notices
⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.
⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Additional Information
CARB: |
This product is not CARB Legal and not for sale in California |
Clearance Item: |
N |
MPN: |
291060 |
Proposition 65: |
Y |
Case Lot Quantity: |
1 |
Category: |
Engine Components>Piston Sets - Forged - 4cyl |
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