Turn any surface into a shrine to old-iron with this Monsters on Machines “Chrome Bone Boiler” Knucklehead sticker. A snarling, chrome-loaded Knucklehead V-twin explodes off the artboard with deep black fins, polished rocker boxes and that classic external carb, all framed by ghostly blue flames and subtle skull details. It’s bold, bright and absolutely dripping with vintage chopper attitude.
Printed on high quality vinyl, this sticker is perfect for toolboxes, helmets, shop fridges, gas tanks, laptops or anywhere else you want to fly your Knucklehead colors. Strong adhesive, vibrant inks and a clean die-cut outline help the artwork pop without a big white border getting in the way.
Vehicle info: Artwork inspired by classic Harley-Davidson Knucklehead V-twin engines from the 1930s–1940s. It captures the spirit and silhouette of the motor, but is not tied to any single year or model.
Dear Karen: this image is intended to be an artistic interpretation of the engine, not an exact technical replica. If you need a precise reference of a particular bike, a camera or service manual will serve you better. This one is for the folks who love loud colors, hot-rod line work and hanging cool art in the garage.
Vehicle Info Blurb (standalone)
Artwork inspired by vintage Harley-Davidson Knucklehead V-twin engines (1930s–1940s). Not model-specific and not a technical drawing—built purely as a bold, hot-rod style tribute to the classic Knuck.
Perfect for tanks, tool chests, shop doors, parts bins, guitar cases, and any place you want to fly the Knucklehead flag.
Package Info
