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this is my first post and i need a bit of help with my micra 1.0 box shape i want to make it a tiny bit faster but the mods cant be visible. ive seen from some other micras that the airbox is drilled (the scrutineers allow this) to let more air in but does this help? because i am racing on...

hi, ive got a standard micra 1.0 1992 stock car that i just got for this season but i want to make it a bit quicker so was wondering if the 1.2 micra carb is bigger and whether it will fit on the 1.0 inlet manifold and what else could i do to make it a bit quicker? thanks:)