# Ross Pistons 99639 Ross Racing Forged Pistons | Summit Racing

**Manufacturer:** Ross Pistons  
**MPN:** `99639`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Ross Pistons |
| Manufacturer name | Ross Pistons |
| Manufacturer | Ross Pistons |
| DimensionUnit | inch |
| Extra Product Name | Ross Pistons 99639 Ross Racing Forged Pistons \| Summit Racing |
| diameter | 0.866 |
| height | 1.22 |
| height_Attrib | Compression Height (in.) |
| length | 5.933 |
| length_Attrib | Rod Length |
| moq | 1 |
| MPN | 99639 |
| multiple | 1 |
| qtyInStock | Jul 26, 2023 |
| SKU | ROS-99639 |
| tierMinQty1 | 1 |
| tierPrice1 | 658.9900 |
| width | 0.866 |
| width_Attrib | Pin Diameter (in.) |
| Brand | Ross Pistons |
| Manufacturer's Part Number | 99639 |
| Part Type | Pistons |
| Product Line | Ross Racing Forged Pistons |
| Summit Racing Part Number | ROS-99639 |
| Piston Rings Included | Yes |
| Bore (in ) | 3.572 in. |
| Bore (mm) | 90.729mm |
| Stroke | 3.543 in. |
| Engine Stroke Type | Stroked |
| Rod Length | 5.933 in. |
| Piston Style | Dish, with no valve reliefs |
| Piston Material | Forged aluminum |
| Compression Height (in ) | 1.220 in. |
| Piston Head Volume (cc) | +6.75cc |
| Wrist Pin Style | Press-fit or floating |
| Wrist Pin Retainers Included | No |
| Wrist Pin Included | No |
| Pin Diameter (in ) | 0.866 in. |
| Piston Ring Thickness | 1.50mm x 1.50mm x 3.00mm |
| File Fit | No |
| Gapless | No |
| Quantity | Sold as a set of 8. |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Summit Racing | ROS-99639 | 658.99 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/134000000/134465000/part_--99639---RossPistons--2b83b01a18.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp