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Engines and Components› Pistons and Piston Rings
JE Pistons
JE Pistons BMW S14B32 13:1 KIT Set of 4 Pistons
SKU: J001 312386
Moderate — 2–4 hours
Overview
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Part #: 312386
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons.
Features:
- Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
- Designed specifically for each engine and use application to provide optimized performance durability
- Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
- Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise
- Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
- Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
- Made 100% in the USA
JE, BMW, S14B23, 3.701 in. Bore, 13.00:1, Dome, 4 Cyl. Piston Kit
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Engine knocking or pinging under load
- Loss of power during acceleration
- Excessive oil consumption
- Engine misfire at high RPM
- Abnormal blow-by from crankcase
Diagnostic Codes
- P0300 – random misfire
- P0301 – cylinder 1 misfire
- P0302 – cylinder 2 misfire
- P0303 – cylinder 3 misfire
- P0304 – cylinder 4 misfire
- P0305 – cylinder 5 misfire
- P0306 – cylinder 6 misfire
- P0307 – cylinder 7 misfire
- P0308 – cylinder 8 misfire
Relevant Conversations
- Car has loud knocking sound under acceleration, need new pistons
- P0300 random misfire after high mileage, looking for forged pistons
- Best dome pistons for turbo build 94mm bore
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- Symptoms of worn pistons in Honda K-series
- How to install forged pistons in my car
- Compression loss in cylinder 3, should I replace pistons?
- Piston-to-wall clearance for JE 2618 alloy pistons
- Will upgraded pistons help with detonation on boosted engine
- Co-purchase: forged pistons and connecting rods for rebuild
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
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Specifications
| Brand | JE Pistons |
| Part Number | J001 312386 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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