shinko, stock hayabusa size, arm is alumipro+2-+8. i think i am going to cut and add 3/4 inch to it. then it will fit right. must be made for prostreet arm longer.
When you secure it to the brackets the fiberglass will flatten out and widen. It's normal. I though the same thing. Secure your brackets and then work out. The fiberglass is more maliable than you expect.
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