These Stage 1 pistons from JDY Performance, listed as made by Diamond, are designed for the 3.0T BMW S58 engine in the M2, M3 and M4 (G8X). They keep the stock 84mm bore with a 9.2:1 compression ratio, and the billet 2618 alloy is chosen for strength and low weight. JDY rates the Stage 1 for builds up to 1500+ horsepower, and fits Total Seal rings that are thicker than OEM along with ring grooves re-engineered for heat management and durability. Custom valve pockets are designed to clear Kelford stage 1, 2 and 3 camshafts.
Features
- Stock 84mm bore with 9.2:1 compression ratio
- Billet 2618 alloy for strength and low weight
- H13 wrist pins, 23mm diameter, 0.225 inch wall
- Total Seal rings, thicker than OEM, for better sealing
- Re-engineered ring grooves for heat management and durability
- Valve pockets suit Kelford stage 1, 2 and 3 camshafts
- Stage 1 suited to builds up to 1500+ horsepower, per JDY
Specifications
- Brand: JDY Performance
- Product Type: Pistons
- Manufacturer: Diamond
- Stage: Stage 1
- Bore: 84mm stock bore size, 3.307 inches finished bore size
- Compression Ratio: 9.2:1
- Material: Billet 2618 alloy
- Wrist Pins: H13 alloy, 23mm (0.905 inches) diameter, 2.250 inches long, 0.225 inch wall
- Rings: Total Seal
- Part Number: JDY-DIAP-S58-ST1
Vehicle Compatibility: 3 applications across 1 make. Select a make to view.
BMW (3)
| Model | Variant | Engine | Years |
|---|---|---|---|
| M2 | G8X | S58 3.0T | |
| M3 | G8X | S58 3.0T | |
| M4 | G8X | S58 3.0T |
Images shown are generic and for illustration only. The part supplied may differ in appearance.
Please confirm fitment against your vehicle before ordering. Contact us if you need help selecting the right part.