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====== OS SPEED 21VZ-B V-Spec ======

^Item ^ Part Number 
| Manufacturer | OS Engines |  
| Model | 21VZ-B V-Spec | 
| Displacement | 3.46cc/0.211cu in | 
| Intake Ports | 3 | 
| Exhaust Ports | 1 | 
| Designed Use | 1/8 Off Road | 


===== Variants =====
==== OS Speed 21VZ-B V-Spec ====
^Variant ^ Notes 
| Bore x Stroke | Part#13893 | 
| Rod Length | Part#1 |
| Intake Ports | Part#13893 |
| Exhaust Ports | Part#13893 |
| Sleeve Type | ABC |
| Crankshaft  | Double Tungsten Slugged/DLC Coated/Silicone Fill |
| Crankshaft Diameter | 14mm |
| Crank Nose | SG Style |
| Rear Bearing | Part#13893 |
| Front Bearing | Part#13893 |
| Case |  |
| Carburetor  | SG Style |
| Head | Turbo |
| Glow Plug | Part#13893 |
| Cooling Head | Part#13893 |
| Backplate | Bump Start |
| Crank Nose | SG Style |
| Weight | Part#13893 |

==== OS Speed 21VZ-B V-Spec AL ====
==== OS Speed 21VZ-B V-Spec SpecII ====
==== Protek 321B Samurai V2 ====
==== Ninja JX21 B01 ====
==== Ninja JX21 B01A ====

^Variant ^ Notes 
| OS Speed 21VZ-B V-Spec | Original, Magnesium cooling head, 320.5g/11.3oz, Part#13893 |  
| OS Speed 21VZ-B V-Spec AL | Same as original, Aluminum cooling head, 361.8g/12.46oz, Part#13894 |  
| OS Speed 21VZ-B V-Spec SpecII | Same as original, Drilled Aluminum cooling head, 349g/12.32oz, Part#13811 |
| Protek 321B Samurai V2 | Same as Speed, Drilled Aluminum cooling head, 355g/12.52oz, Part#PTK-2500 |  
| Ninja JX21 B01 | 5 port version of Speed, Aluminum cooling head, 361.8g/12.46oz, Part#JX21B01 |
| Ninja JX21 B01A | Same as original JX, Drilled Aluminum cooling head, 374g/13.19oz, Part#JX21B01A |