| Description_ASM |
Subaru EJ255/EJ257 with EJ20 Head |
| Description_DEF |
Engine Piston |
| Description_DES |
Piston Single, 2618, Inv Dome/Dish, 3.918 Bore, 1.209 CD, 0.905 Pin, Set of 1. |
| Description_INV |
JE Pistons, Piston |
| Description_EXT |
JE Ultra, Subaru, EJ Series, 3.918 in. Bore, 8.50:1, Inverted Dome/Dish, Left Piston |
| Description_FAB |
- 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
|
| Description_SHO |
Piston |
| Description_TLE |
Subaru EJ255/EJ257, 99.52 Bore, Dish, Set of 1 |
| Description_MKT |
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 import and sport compact applications from 2JZ to 4G63 and Audi to BMW, 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 high-boost build. As with all JE Pistons products, Ultra Series pistons are made 100% in the USA. |
| Engine |
EJ SERIES |
| Oil Ring Thickness |
0.0995 |
| Prop 65 - Short Label |
Prop 65 Warning Label.JPG |
| Engine Type |
ICE |
| Piston Pin Length |
2.250 |
| Forging Type |
FSR |
| Piston Pin Wall Thickness |
0.210 |
| Make - Web |
Subaru |
| Wrist Pin Wall Thickness |
0.210 |
| Piston Pin Material |
9310 |
| Ringset Included |
Yes |
| Product Type |
Engine Piston |
| Piston Orientation |
Left |
| Prop 65 Yes/No |
Yes |
| Piston Head Type |
Dish |
| Bore Diameter |
99.52 |
| Title - Web |
JE Ultra Series Subaru EJ Series Piston - 99.52 mm Bore - 1.209 in. CH, -25.50 CC |
| Piston Average Weight |
413 |
| Category Hierarchy |
Auto>JE Ultra Series>Single Replacement Pistons>Sport Compact |
| Piston Volume |
-25.50 |
| Piston Series |
JE Ultra Series |
| Make |
SUBARU |
| Out of Stock Message |
Call for Availability |
| Ring Set Included |
Yes |
| Wrist Pin Outer Diameter |
0.905 |
| Piston Material |
2618 |
| Compression Height |
1.209 |
| Piston Pin Outside Diameter |
0.905 |
| Prop 65 (C, R or CR) |
CR |
| Add-On |
JG4901-3917 |
| Industry |
Automotive |
| Add-On |
905-2250-21-93S |
| Cylinder Head |
EJ257 STI |
| Title |
JE Ultra Series - Subaru, EJ Series, 99.52 mm Bore, Piston |
| Add-On |
905-042-CT |
| Product Market |
Sport Compact |
| Top Compression Ring Thickness |
0.0480 |
| Second Compression Ring Thickness |
0.0480 |
| Wrist Pin Material |
9310 Nickel Carbon Steel Alloy |
| Wrist Pin Length |
2.250 |
| Engine - Web |
EJ Series |
| Length |
5.0000 |
| Width |
5.0000 |
| Height |
5.0000 |
| Weight |
1.0000 |
