This Stage 2 piston set is built for the BMW S58 3.0T engine in the G8X M2, M3 and M4, and the listing names Diamond as the piston maker. The pistons are machined from billet 2618 alloy with a stock 84mm bore and a 9.2:1 compression ratio, and they carry Total Seal rings that JDY Performance describes as thicker than OEM. At Stage 2 the pistons are hard anodised and paired with DLC coated H13 wrist pins, and the ring grooves have been re-engineered for heat management. JDY Performance rates the set for builds of 1800+ horsepower, and the valve pockets are cut to clear Kelford stage 1, 2 and 3 camshafts.
Features
- Billet 2618 alloy pistons
- Stock 84mm bore with 9.2:1 compression ratio
- Hard anodised pistons and DLC coated wrist pins
- Total Seal rings, thicker than OEM
- Re-engineered ring grooves for heat management
- Valve pockets suit Kelford stage 1, 2 and 3 camshafts
- Rated by JDY Performance for 1800+ horsepower builds
Specifications
- Brand: JDY Performance
- Product Type: Stage 2 Piston Set
- Material: Billet 2618 alloy
- Bore: 84mm stock (3.307 inches finished bore)
- Compression Ratio: 9.2:1
- Wrist Pins: H13 alloy, DLC coated, 23mm (0.905 inches) diameter, 2.250 inches long, 0.225 inch wall
- Rings: Total Seal
- Finish: Hard anodised
- Power Rating: 1800+ horsepower (per JDY Performance)
- Part Number: JDY-DIAP-S58-ST2
Vehicle Compatibility: 3 applications across 1 make. Select a make to view.
BMW (3)
| Model | Variant | Engine | Years |
|---|---|---|---|
| M2 | G8X | 3.0T S58 | |
| M3 | G8X | 3.0T S58 | |
| M4 | G8X | 3.0T S58 |
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.