These anodized 6061 billet aluminum plugs replace the stock plastic plugs.

Fits '03~'05 YZ450F, '01~'13 YZ250F, '01~'02 WR250F, plus '08~'13 WR250R, '08~'11 WR250X; also fits '98~'99 YZ400F, '00~'02 YZ426F, '98~'00 WR400F, '01~'02 WR426F, all TT-Rs, all XT250, all XT225.