[jray002]

just wondering if any one has had any problems with stock valves with a 686 bore. 11:1 comp. should I change the valves or would the stocks be ok. thanks

 

[Geisick]

Stock 660 valves are junk because they are way to soft. Go with a good aftermarket SS valve like Ferrea or Kibblewhite.

 

[CoalShedRacing]

I agree with Terry, never ever use stock valves with the HD valve springs if you want reliability.