Every set is built to order. Please allow five weeks for it to ship.
Diamond Pistons forged piston kit for the BMW N54B30 3.0L, set of 6. ASF Machine orders these direct from Diamond for your build (not a stocked item). Diamond builds its sport compact pistons from forged 2618 aluminum, CNC-machines them, and pairs them with Trend Performance wrist pins.
Piston volume: -18cc; compression height: 1.240 in.
Stroke: 89.6mm; rod length: 5.709 in.
Ring set: 1.00 mm x 1.20 mm x 2.80 mm
Wrist pin: 0.866 in. OD x 2.250 in. long
Valve pocket depth: 0.165 in. intake, 0.150 in. exhaust
Forging: full round
Rings, wrist pins and pin retainers included (per Diamond)
Crowns are 3D-milled, so the pistons come ready to install
Offset pin bores for quieter running
Diamond's compression ratios assume a .040 in. head gasket with a gasket bore of 85.0 mm
Top ring down: .300 in.
Wrist pins (chamfered for round-wire locks) and locks included
Valve pockets cut oversize to clear larger-than-stock valves
Forged from 2618 aluminum for high-horsepower and boosted builds
Diamond part numbers:
83082-6: 84mm bore, standard pin, 9.50:1 compression (per Diamond), ring set 09513307, wrist pin G8662250180C
83082-6-H: 84mm bore, -H pin (H8662250225C), 9.50:1 compression (per Diamond), ring set 09513307, wrist pin H8662250225C
83083-6: 84.5mm bore, standard pin, 9.50:1 compression (per Diamond), ring set 09513327, wrist pin G8662250180C
83083-6-H: 84.5mm bore, -H pin (H8662250225C), 9.50:1 compression (per Diamond), ring set 09513327, wrist pin H8662250225C
Specs and fitment: Piston kit, set of 6. -18cc, 1.240 in. compression height. Fits BMW N54B30 3.0L. Ordered direct from Diamond Pistons; call 970-242-0919 to confirm fitment and lead time for your build.
