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JBR ENGINES

*IN STOCK* XFWD Ported B Series Head

*IN STOCK* XFWD Ported B Series Head

Regular price $3,000.00 USD
Regular price Sale price $3,000.00 USD
Sale Sold out
Valve stem Diameter

ONE B16 6mm and ONE GSR 5.5mm AVAILABLE!!

Our XFWD spec cylinder head has been a front runner since it's inception

Constant development & testing has allowed us to provide many racers with the highest flowing head on the market, while retaining appropriate wall thickness for longevity.

Includes:

5 axis CNC porting

Bronze valve guides

JBR SPEC Ferrea Spring Kit

6mm Standard size Exhaust valves (option for 5.5mm)

33mm intake valves

Newen Multi-angle/radii Valve job 

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