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I have (2) Koso 4v heads, (1) 170cc Koso Cylinder, NEW 170cc Koso piston, 34mm Koso intake, Chimera 34mm cold air intake, for sale. All items are in used condition unless otherwise noted. Upon inspection of the parts it seems the valves have touched the piston and caused minor damage to head #2.

Koso Head #1 ($150): This head was rattle can painted with engine block paint and will come pretty bare as I swapped internals over to head #2.

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Koso Head #2 ($200): This head was professionally ceramic coated and comes complete with all internal parts.

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Koso 170cc cylinder ($130) Rattle can painted with engine block paint, remains in great condition with no internal damage.
 

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Do you still have the 170 4v head that’s in good condition? You know the miles on it or if it had any damage at all that will reduce performance? Interested. Thanks :)
 
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