6238 - 5.5hp PROSTOCK Ported 30.5cc 4 Bolt Top End all ports resurfaced

all ports resurfaced

This allows the motor to rev higher and still have a massive amount of torque

Losi and most other large scale rc cars

Also runs well on stock and ported engines by other tuners

Fits all CY and Zenoah engines 22

6238 - 5.5hp PROSTOCK Ported 30.5cc 4 Bolt Top End all ports resurfaced<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