Diamond Forged Piston Kit — BMW S63B44 4.4L V8
Diamond Forged Piston Kit — BMW S63B44 4.4L V8
Diamond Forged Piston Kit — BMW S63B44 4.4L V8
DIAMOND PISTONS · SPECIAL ORDER
BMW S63B44 4.4L V8 forged piston kit
Build your BMW S63B44 4.4L V8 rotating assembly around a Diamond 8-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 construction for a performance engine build.
- Application-specific crown volume and compression height, with exact kit part numbers listed below.
- Matched ring set, gudgeon pins and retainers supplied with each complete kit.
- Side gas ports, moly-coated skirts and 3D-machined crowns.
- Included H13 gudgeon pins with 0.225 in wall thickness.
- 1.0 mm / 1.2 mm / 2.8 mm ring package included.
What your kit includes
8 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 | 8 |
|---|---|
| Compression Height | 1.259 IN |
| Stroke | 88.3 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 |
|---|---|---|---|---|
| 83117-8 | Not published | Not published | Not published |
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 the exact S63B44 revision and rod specification with M Lab before ordering. The supplier does not publish a compression ratio for this kit. Do not assume interchangeability across S63 generations.
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 |
|---|---|---|---|---|---|---|---|
| 83117-8 | 89 MM | -10.3 CC | Not published | H8662250225C | 09553504 | 015113-16 | Confirm with M Lab |
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 S63B44 4.4L V8 engine parts.
Photography shows Diamond’s S63 piston series. 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: S63
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 S63B44 4.4L V8
Workshop installation in Albion, Victoria
Vehicle compatibility
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