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Detailed Product Description
Exact copy of pub yellow jacket big bore headstrong cylinder kit
4/port cylinder
6 port boost piston with raised skirt
New billet head design
Replaceable billet caps
Same proven pbu performance
44mm plus additional transfer design
Complete exhaust porting
Extreme power range gains
New piston design
Shaved ring set
15:1 compression pbu racer dome
Wrist pin, bearing & circlips
Easy installation
Copper gaskets
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