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O.S. - OSMG5012 OSM22105100 22105100 531028136717 4531028136717
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O.S. Inner Head 21VB (P) V-Spec 21C
O.S. Inner Head 21VB (P) V-Spec 21C
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O.S. Inner Head 21VB (P) V-Spec 21C Add to Wish List
84.02  Buy Now 3.96  
O.S. Inner Head 21VB (P) V-Spec 21C Add to Wish List
125.37  Buy Now 6.60  

Tech Notes
This is the Inner Head (Buttonhead)for the
OS Max .21 VZ-B V-SPEC-T engine
It is the second part of a Two-Part system along with the Outer Head.
This design allows for easier replacment of both the Inner & Outer parts.


Aluminum construction


One Inner Head, also known as a "buttonhead."


None, item is a stock part


Diameter: 33mm (1.3")
Glow Plug Thread size: M8x.75mm


If the Outer Head is needed, use OSMG5011
If the Cylinder Head Bolts are needed, use OSMG8673.
If the Gasket Set is needed use OSMG6180.

cmb 8/31/04

– If you need more information, use these O.S. resources –
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:

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Parts Compatibility
Parts Compatibility for O.S. Inner Head 21VB (P) V-Spec 21C
This item is a replacement part for the following:
 LXGPF0 O.S. 21VZ-B V-Spec-T (P) ABC w/21J Slide Carb  (Parts List)
 LXSJT3 O.S. Speed 21 VZ-B V-SPEC AL  (Parts List)
 LXWDH4 O.S. 21VZ-B V-Spec II World Edition Off-Road  (Parts List)
 LXPNM7 O.S. OS Speed 21VZ-B V-Spec Engine w/ 21H Slide Carb  (Parts List)

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