Cox .049 / .051 Timing Shims
Set of four (4)
Features:
Raises exhaust port to delete SPI (Sub Port Induction)
Counteracts RPM loss when using a muffler or throttle ring on engines with SPI
Installs between crankcase and base of cylinder
Two (2) Shims .27mm (.010")
Counteracts RPM loss when using a muffler or throttle ring on engines with SPI
Installs between crankcase and base of cylinder
Two (2) Shims .27mm (.010")
Two (2) Shims .39mm (.015")
Brand new Current Production items
Application:
Application:
All Cox .049 engines
All Cox .051 engines