Std kit has plastic gearbox tops as others have said. Lower gearbox casings are all alloy from kit. All pullies are alloy, side gears is one alloy and one plastic. There is 2 different types of front kick up block. to be honest i'm not sure which one comes wtih kit - both are alloy, just kick up that is different.
Can't think of any car that comes with a front one way (diff) and this is no different. Std ball diff here. I have generally run a one way, but i think Si has generally run a diff, with Grant having switched between. Think all the guys at the F2's were running diffs with one way layshaft pully.
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Matthew White
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