hi everyone,

is there any reason why there are two types of guides available for the 2 1/4L petrol motor?

one is the internal 'o' ring type and the other has an external boot.

Is it OK to use internal 'o' ring type guides and external boot type guides together?

i already have new inlet guides with the internal 'o' ring just need exhaust guides and it seems they are hard to find with the internal 'o' ring.

cheers for all your help