Diamond Special Order Nissan GT-R R35 VR38DETT Forged Pistons — 94.40 mm Stroke / 6.500 in Rod
Diamond Special Order Nissan GT-R R35 VR38DETT Forged Pistons — 94.40 mm Stroke / 6.500 in Rod
DIAMOND PISTONS · SPECIAL ORDER
Nissan GT-R R35 VR38DETT forged piston kit
A Diamond six-piston kit for a VR38DETT assembly built around a 94.40 mm stroke and 6.500 in connecting rods. The catalogue lists two supplier grades at the same 95.50 mm bore, crown volume and nominal compression ratio.
Made to order. Allow approximately 5–6 weeks for delivery, pending Australian customs processing time.
Precision in the details
- 2618 forged aluminium with a full-round forging profile.
- Oil-ring-fed pin lubrication and fitted gudgeon pins.
- Moly-coated skirts.
- 3D-machined crown and valve-pocket profiles.
- The specified ring set, pins and retainers are included in the kit price.
Choose your specification
Select supplier Grade 1 (81007-6) or Grade 2 (81008-6). Both published kits specify a 95.50 mm finished bore, -0.86 cc crown, 9.50:1 nominal ratio and included H9052500200C pins. Diamond does not publish the grade-specific dimensional difference or running clearance on these pages. Confirm the required grade with BBT and your engine builder before ordering.
Build dimensions
| Dimension | Published specification |
|---|---|
| Piston quantity | 6 |
| Crank stroke | 94.40 MM |
| Connecting-rod length | 6.500 IN |
| Compression height | 1.230 IN |
| Forging profile | Full Round |
Engineering reference: rings, pins and valve pockets
Ring sizes are listed as top / second / oil ring. Verify pin dimensions against the connecting-rod small end. Valve-pocket depths are catalogue dimensions; 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 |
|---|---|---|---|---|
| 81007-6 | 1.20 mm / 1.50 mm / 3.00 mm | 0.905 in | 2.500 in | 0.071 in / 0.071 in |
| 81008-6 | 1.20 mm / 1.50 mm / 3.00 mm | 0.905 in | 2.500 in | 0.071 in / 0.071 in |
Fitment and engine preparation
For a Nissan GT-R R35 VR38DETT custom build with the specified 94.40 mm crank stroke, 6.500 in rods and 1.230 in compression height. This combination requires the matching crankshaft and connecting rods. It is not the stock 88.40 mm stroke kit or the separate 98.40 mm stroke / 100.00 mm bore kit.
Catalogue bores are finished cylinder-bore sizes. Nominal compression ratios depend on the measured chamber volume, deck clearance and compressed head-gasket thickness. Use the instructions supplied with your exact kit for piston-to-wall clearance, ring end gaps and pin fit; confirm all machining and assembly dimensions with your engine builder.
View kit part numbers and supplied components
| Kit SKU | Bore | Crown volume | Nominal ratio | Included pin | Ring set | Retainer | Oil-rail supports |
|---|---|---|---|---|---|---|---|
| 81007-6 | 95.50 MM | -0.86 CC | 9.50:1 nominal | H9052500200C | 09503760 | 015130-12 | No |
| 81008-6 | 95.50 MM | -0.86 CC | 9.50:1 nominal | H9052500200C | 09503760 | 015130-12 | No |
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 BBT before ordering for a build with a fixed deadline.
Plan your build with BBT
Built by Boost & Tune can help select the kit for your measured engine, fuel and intended use. Connecting rods, crankshafts, machining, engine assembly and tuning are purchased separately.
Browse Nissan GT-R R35 VR38DETT engine parts.
View the separate 88.40 mm stroke piston kit.
View the separate 98.40 mm stroke piston kit.
Manufacturer photography shows a representative Diamond piston from this catalogue series. Crown shape, valve pockets, skirt finish and supplied components vary with the selected part number. The exact kit tables define the supplied specification.