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#474139K-M-STD
$603.77
/set
Factory Shipped
$745.40
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| MFG. Part # | KB139KTM.STD |
| Piston Style | Flat Top w/ 2 valve reliefs |
| Piston Material | Hypereutectic Aluminum |
| Wrist Pin Included | Yes |
| Wrist Pin Style | Press-Fit or Floating |
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| KEY SPECS | |
|---|---|
| MFG. Part # | KB139KTM.STD |
| Brand | Keith Black |
| Piston Style | Flat Top w/ 2 valve reliefs |
| Piston Material | Hypereutectic Aluminum |
| Wrist Pin Included | Yes |
| Wrist Pin Style | Press-Fit or Floating |
| GENERAL | |
| Stroke | 3.75" |
| Connecting Rod Length | 5.700" |
| Wrist Pin Diameter | 0.927" |
| Piston Rings Included | Yes |
| Top Ring Thickness | 1/16" |
| Second Ring Thickness | 1/16" |
| Oil Ring Thickness | 3/16" |
| Compression 58cc = | 12.3 : 1 |
| Compression 64cc = | 11.4 : 1 |
| Compression 76cc = | 10.0 : 1 |
| Engine Displacement | 400 cu. in. |
| Bore Size | 4.125" |
| Compression Height | 1.433" |
| Piston Head Volume | 7 |
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