Buying and fitting new MTB suspension

i'm buying the Rockshox 2008 revelation 426 dual air, from merlin cycles (great price). i have a 2006 kona kiakpu and was wondering whether the suspension stem ( the bit that slots into the bike ) is a standard size?
thanks.
thanks.
Bike - Trek Remey
Kenesis XC2 custom build
Kenesis XC2 custom build
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Parktools has a good guide on fitting them.
VOODOO CANZO
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EDIT - they did this despite selling me the parts after applying the same discount as quoted on their internet site. Take note "Tredz" etc who have seperate internet and in-store prices.