TwinZter Kits
XLXB Exclusive with Cylinders and Pistons
Click on each street or race kit for more information

• Full 'Street' Port with XLXB Exclusive Textured Intake Finish 

• New .650" Lift Titanium Dual Spring Pack

• New Bronze Guides 

• New 2.100 Intake and 1.610 Exhaust Valves  

• New XLXB exclusive Ductile Iron Finned or Finless Cylinders

• New High Compression XLXB Exclusive Pistons

• XLXB Exclusive ARP Case Studs 

• Grade 8 Head Bolt Kit

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Proprietary to XLXBhorsepower, the TwinZter (a Twin Cam head on a stock case Sportster) was developed for max effort Sportster builds.  Your CVO110 heads are modified to work with the XLXB TwinZter cylinders.  Twin Cam pushrod holes are moved to the XL pattern location, factory oil drains are plugged, and new oil lines are machined for external drains. The pairing of the oversize valves and race porting make this kit stand out.  1.80 intake window opening. 

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*All TwinZter kits must use XLXB exclusive cylinders and pistons

**Titanium valves and Bronze seats available by request for an additional cost