Diamond Forged Piston Kit — BMW / Toyota B58 3.0L
Diamond Forged Piston Kit — BMW / Toyota B58 3.0L
Diamond Forged Piston Kit — BMW / Toyota B58 3.0L
DIAMOND PISTONS · SPECIAL ORDER
BMW / Toyota B58 3.0L forged piston kit
Build your BMW / Toyota B58 3.0L rotating assembly around a Diamond 6-piston forged kit. Confirm the listed bore, crown volume and supplied gudgeon pins against your measured engine, fuel and intended use.
Made to order. Allow approximately 5–6 weeks for delivery, pending Australian customs processing time. Manufacturing schedules, international freight and customs clearance may extend this estimate.
Precision in the details
- 2618 forged aluminium with a full-round forging profile.
- Oil-ring-fed pin lubrication and fitted gudgeon pins.
- Side gas ports and moly-coated skirts.
- 3D-machined crown and valve-pocket profiles.
- The specified ring set, pins and retainers are included; check the kit table for exact component part numbers.
What your kit includes
6 forged pistons, the specified ring set, gudgeon pins and retainers. Oil-rail supports are supplied where indicated in the exact kit table.
The specified gudgeon pins are included in the kit price. Check the pin part number and dimensions in the kit table when matching connecting rods.
Build dimensions
| Piston Quantity | 6 |
|---|---|
| Compression Height | 1.305 IN |
| Stroke | 94.60 MM |
| Rod Length | 5.834 IN |
| Ring Set Thickness | 1.00 MM x 1.20 MM x 2.80 MM |
| Forging Type | Full Round |
Engineering reference: rings, pins and valve pockets
Ring sizes are listed as top / second / oil ring. Check pin diameter and length against your connecting-rod small end. Valve-pocket depths are catalogue dimensions; your engine builder must check piston-to-valve clearance with the actual cylinder heads, camshafts and cam timing.
| Kit SKU | Ring package | Pin diameter | Pin length | Valve-pocket depth: intake / exhaust |
|---|---|---|---|---|
| 37050-6 | 1.00 mm / 1.20 mm / 2.80 mm | 0.866 in | 2.250 in | 0.195 in / 0.175 in |
A dimension marked “Not published” needs confirmation with M Lab before ordering. Catalogue dimensions do not specify running clearance or ring end gap; use the instructions supplied with your exact kit.
Fitment and engine preparation
Confirm your exact B58 generation, head, rod and piston geometry with M Lab before ordering. Compatibility varies by B58 revision; confirm the crown, injection system and rotating assembly. The included gudgeon-pin specification is H8662250185C.
Catalogue bores are finished cylinder-bore sizes. The finished compression ratio depends on chamber volume, deck clearance and compressed head-gasket thickness. Have your engine builder verify piston-to-wall clearance, ring gaps, pin fit and piston-to-valve clearance using the supplied Diamond instructions before machining or assembly.
View kit part numbers, bore sizes and supplied components
| Kit SKU | Bore | Crown volume | Ratio | Included pin | Ring set | Retainer | Oil-rail supports |
|---|---|---|---|---|---|---|---|
| 37050-6 | 82.00 MM | -8.40 CC | 11.00:1 nominal | H8662250185C | 09523228 | 015113-12 | No |
This listing supplies the kit specification shown above, including its stated gudgeon pins. Confirm the build dimensions against your engine before ordering. Compression ratios are nominal catalogue figures; the final ratio depends on the measured chamber, deck and gasket volumes.
Made to order · delivery
Allow approximately 5–6 weeks for delivery, pending Australian customs processing time. Manufacturing schedules, international freight and customs clearance may extend this estimate. Contact M Lab before ordering for a build with a fixed deadline.
Plan your build with M Lab
M Lab by Boost & Tune can help select a specification for your fuel, boost and intended use. Machining, engine assembly, connecting rods and tuning are purchased separately.
Browse related BMW / Toyota B58 3.0L engine parts.
Photography shows a representative Diamond piston design. Crown shape, valve pockets, skirt finish and supplied components vary with the selected part number.
M Lab BMW workshop support
Discuss your BMW application, component selection and installation requirements with M Lab by Boost & Tune in Melbourne. Confirm fitment and the supplied configuration before ordering.
Fitment basis: All BMW vehicles equipped with the listed engine family.
Engines: B58
View full year and variant fitment
PROFESSIONAL FITTING AVAILABLE
Need M Lab by Boost & Tune to install this?
Have this part professionally fitted, checked and configured by our BMW performance workshop.
Product: Diamond Forged Piston Kit — BMW / Toyota B58 3.0L
Workshop installation in Albion, Victoria
Vehicle compatibility
Fits these BMW platforms
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