Marky,the B4 wide bumper comes from RPM,and it only needs some minor modification to fit. You need to remove the location dimples on the mounting part of the bumper,because the Rat doesn't have compatible locating holes,then you need to carefully mod the holes to match up with the Rat's.
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Kyosho Inferno US Sports:- RB WS7 III engine,HN 2047 pipe & HN13mm shocks.
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