Knucklehead Muffler & Pipes Extension

Mufflers and tail Pipe extensions for Knucklehead models thru 1947 Different length extensions in a variety of styles, and a nice selection of mufflers that will slip over any 1¾"-diameter headpipe. All measurements shown are overal lengths. Sold each.

1-7/8"-DIAMETER TAIL PIPE EXTENSIONS Fit over 1." diameter pipes, but have no slider channels or baffles.
607S-KNU* 18"-long Slash Cut
607G-KNU* 18"-long Goose Cut
605S-KNU* 31"-long Slash Cut
605F-KNU* 31"-long Flared Tip
605G-KNU* 31"-long Goose Cut

599-KNU* 2."-diameter Super Slash Cut muffler with slider channel on left-side (19"-long)
614-KNU* 3"-diameter Rocket muffler (31"-long)
615-KNU* 3"-diameter Rocket muffler (28"-long)
615A-KNU* 3"-diameter Rocket muffler (22."-long)
613-KNU* Slash Cut turnout megaphone with slider channel on left-side (29"-long)
606HR-KNU* 2."-diameter right-side High-Sweep muffler 
606HL-KNU* 2."-diameter left-side High-Sweep muffler 
616-KNU* 3"-diameter Turnout or Turndown muffler (22"-long)
617-KNU* 3"-diameter Turnout or Turndown muffler (31"-long)


  • Items in stock will be dispatched within 2 business days. Once shipped, you will receive an order confirmation email with a tracking number.

    For items *built to order, shipping times may vary. To inquire about specific shipping times for custom orders or for products you are interested in, please contact us at or call 1-800-426-2621.

    *Built-to-order items include Frames, Springers, Gas Tanks, Oil Tanks, Trike Products, and any product currently out of stock. If an item you've ordered is on backorder, you will be notified within 2 business days of placing your order.

You May like this