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ill bet if you ask FBM they will put a T4 flange on theirs,well maybe. dont hurt to ask. so no need to buy a new housing
Did you mean T3? The standard flange on the FBM sidewinder is a T4. My uppipe uses a 3-5/8" v-band (standard T4 vband), so I'd need to get something modified regardless. Off topic, what color are your rims (assuming that's your car in your avatar)?