Bullet Proof Designs Swingarm Guard.
PN# BPD-KTM-CG-23

BULLET PROOF DESIGNS SWINGARM GUARDS
Add additional protection to the rear guide mounts.
Machined from solid 6061-T6 billet aluminum for superior strength.
Use with the TM Designworks rear chain guide. 
Made in the USA

Fitment From Parts Finder:
HUSKY  (22-26) FC 250, 450 Rockstar Edition

Also Fits Models Below:
KTM (22-26) 250, 450 SX-F Factory Editions 
KTM (23-27) 125-450  SX, SX-F, XC, XC-F  2 & 4 Strokes
HUSKY (23-27) FC, FX  250-450 & TC, TX 125-300
GAS GAS  (23-26)  MC 250, 450  Factory Editions 
KTM (24-27) 150-500 XCW, XCF-W, EXC
HUSKY (24-27) FE 250-501 & TE 150-300
GAS GAS (24-27) EC, ES, EX, MC 125-500 2 & 4 Strokes