6238 - 5.5hp PROSTOCK Ported 30.5cc 4 Bolt Top End Losi and most other large

Losi and most other large scale rc cars

Fits all CY and Zenoah engines 22

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Transfer bowls have been changed to help with flow and oil holes have been added to prolong crankcase bearing life

6238 - 5.5hp PROSTOCK Ported 30.5cc 4 Bolt Top End Losi and most other large<p>(Our porting is not shown in picture)&nbsp;< p> <p>PROSTOCK An affordable mild version of a full mod. The PROSTOCK's are rated at 5 5. 5hp, full mod's 6 6. 5hp, and full mod long rods 7 7. 5hp.&nbsp;<span>We guarantee performance of this top end to be as much if not more than similary priced ported top ends from our competitors.&nbsp;< span>< p> <p>The PROSTOCK line has replaced the Race Ported line. The PROSTOCK engines produce more power than the