LEGO part 41239 - Red Technic, Liftarm 1 x 13 Thick at BrickScout
LEGO PART 32018 Technic Brick 1 x 14 [13 Holes] | Rebrickable - Build with LEGO
LEGO Technic - 15L x 13 studless grey | eBay
LEGO part 42545pb002R - White Technic, Panel Car Mudguard Arched 13 x 2 x 5 with Black, Red and Gray Diagonal Stripes Model Back Right Side at BrickScout
LEGO Technic - 13 studs axle with diff-lock - YouTube