Click to zoom in
The JE Pistons forged piston kit identified by manufacturer part number 314438 is designed to provide the piston geometry, material, and compression configuration for a specific performance-engine build. Final compatibility depends on the complete engine combination and measured dimensions, not the part title alone.
Key Features
- JE Pistons is the leader in forged racing pistons.
- With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2002-2005 | Subaru | Impreza | Verify engine code and all build dimensions |
Specifications
| Brand | JE Pistons |
|---|---|
| Manufacturer Part Number | 314438 |
| Product Type | Forged Piston Kit |
| Fitment Type | Vehicle Specific |
| Condition | New |
| GTIN | 00193564005243 |
| Piston Series | JE Pistons |
| Cylinder Head | EJ205 WRX |
| Bore Diameter | 92.50 MM |
| Piston Head Type | Dish |
| Compression Height | 1.287 IN |
| Piston Volume | -11.70 CC |
| Piston Material | 2618 |
| Piston Quantity | 4 |
| Forging Type | FSR |
| Compression Ratio | 8.5:1 |
| Ring Set Included | Yes |
| Top Compression Ring Thickness | 0.0400 IN |
| Second Compression Ring Thickness | 0.0480 IN |
| Oil Ring Thickness | 0.111 IN |
| Wrist Pin Outer Diameter | 0.905 IN |
| Wrist Pin Length | 2.250 IN |
| Wrist Pin Wall Thickness | 0.180 IN |
What's Included
One new JE Pistons forged piston kit identified by manufacturer part number 314438 in the quantity and configuration stated by the official specifications. Rings, pins, locks, coatings, and installation components are included only when expressly listed for this exact part number.
About JE Pistons
JE Pistons engineers forged racing pistons, piston rings, wrist pins, locks, and related engine components for measured domestic, import, European, and professional motorsport builds.
Related JE Pistons Products
- Shop all JE Pistons products
- JE Pistons SUB WRX EJ205 79mm STR 92.5mm Bore CR 8.5 KIT Set of 4 Pistons
- JE Pistons SUB WRX EJ205 79mm STR 92.5mm Bore CR 9.5 KIT Set of 4 Pistons
- JE Pistons SUB WRX EJ205 92.5mm Bore CR 9.5 KIT Set of 4 Pistons
Frequently Asked Questions
Will JE Pistons 314438 fit my 2002-2005 Subaru Impreza?
That year, make, and model range is listed. Confirm the exact engine code, bore, stroke, rod length, pin size, cylinder head, compression target, and machine-shop measurements before ordering.
Are piston rings included with this 92.50 MM JE piston kit?
The official JE specification lists Ring Set Included as Yes. Confirm pins, locks, quantity, and any upgraded pin option in the What's Included section before assembly.
What must the machine shop measure before final assembly?
Verify finished bore diameter, piston-to-wall clearance, ring end gaps, deck height, piston-to-valve clearance, pin fit, bearing clearances, and final compression ratio for the intended fuel, boost, and power level.
Installation Instructions
Use the current JE Pistons instructions for part number 314438 and the engine builder's measured assembly specifications. A qualified machine shop must verify bore finish, clearances, ring gaps, pin fit, lock installation, orientation, balance, deck height, valve clearance, compression ratio, lubrication, and break-in before operation.
Engine
Shop automotive engine parts, cooling-system components, oil-system upgrades, ignition parts, pulleys, sensors, gaskets, fuel components, and engine-bay accessories at Black Ops Auto Works. This collection covers vehicle-specific replacement parts, performance upgrades, supporting hardware, and universal components for street cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and motorsport applications. Engine Parts and Performance Components The Engine collection brings together components used throughout the engine, lubrication system, cooling system, ignition system, fuel system, crankcase ventilation, accessory drive, and engine compartment. Available products range from replacement sensors and gaskets to rotating-assembly parts, performance cooling systems, supercharger pulleys, catch cans, cylinder heads, camshafts, intake manifolds, and engine-bay dress-up components. Engine compatibility cannot be determined from vehicle model alone. Confirm the exact year, make, ...
View Engine Products
JE Pistons
Shop JE Pistons forged piston kits, ring sets, wrist pins, and retainers by exact manufacturer part number, official dimensions, and verified engine application. JE Pistons Product Families The collection includes forged piston kits for domestic, import, and European performance engines plus JE Pro Seal ring sets, wrist pins, and pin retainers for measured engine assembly. Choosing the Correct JE Pistons Component Match the exact JE Pistons manufacturer part number Confirm engine code, bore, stroke, rod length, and cylinder head Calculate compression with measured chamber, gasket, deck, and piston volume Verify pin diameter, pin length, wall thickness, and rod small-end design Match ring bore and every groove thickness to the piston Use machine-shop measurements for final clearances and ring gaps Related Engine Collections Pistons Piston Rings Connecting Rods Engine Block Components Frequently Asked Questions Does matching the engine family guarantee a JE piston kit will fit?No...
View JE Pistons Products