Exhaust

The Cyclery Exhaust Systems for IOE Twins 1915-1923

Reproductions of the stock exhaust systems. The systems consist of the two headers, the muffler with the year-correct cutout, and the tailpipe. The systems are supplied as separate components and must be assembled. The instructions for doing so are available online here.

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The Cyclery Exhaust Systems for IOE 1925-1928

Excellent reproduction of the stock exhaust system. Unlike with other reproductions on the market great care was taken to perfect fitment and small details which are so important when you show your bike to the experts. The set includes front and rear pipe, muffler with cutout door and rear clamp.

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The Cyclery Exhaust Systems for IOE 1929

More power for the customers, but at the same time increased demands on noise reduction, force the Engineer and designer to take some rather unusual approaches. This was the case with the exhaust system of the last 1929 J-models. The single muffler of the 1928 system was doubled, and in addition each silencer received an expansion chamber mounted on top.
This reproduction of the standard exhaust system from 1929 was manufactured exactly according to the model of the rare original system, whereby great care was taken to perfect fitment and attention to details. The exhaust system consists of front and rear pipes, mufflers and the necessary clamps.

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Front Muffler Clamp for IOE 1925-1928

This little bracket clamps on the front footboard rod and supprts the muffler.

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The GasBox Header Pipes -1929

Precisely bended replacement header pipes for IOE models 1915-1929.

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The GasBox 2-1 Header Pipes for V-Models

Precise reproductions of the original 2-1 pipe systems. Brackets and connections exactly duplicate the stock counterparts.

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Exhaust Nipples and Sleeve Nuts →1929

Nickel-plated exhaust nipples, packing nuts and brass rings for the exhaust pipes.

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The GasBox Twin Tube Mufflers

Top quality reproduction of the distinctive Twin Tube muffler as originally used on 1930 D-model 45”/750 cc sidevalve twins and 1930-1934 singles. Complete with its clamps.

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The Gasbox 1930 Twin Tube Mufflers

Top quality reproduction of the distinctive Twin Tube muffler as originally used on 1930 V-model Big Twins. Complete with its two clamps.

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VL Style Muffler

Custom fishtail muffler with a design that derives from early Flatheads and Knuckleheads.

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The GasBox Fishtail Mufflers

Top quality reproduction of the fishtail muffler as originally used on Big Twins 1935-1940. The E/U version has the Y-pipe integral with the fishtail muffler.

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Colony Boot Guard Heat Shield

Accurate reproduction of the original boot guard which mounts on the rear exhaust pipe. Used as accessory on 1936-up Big Twin models.

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Exhaust Mounting Brackets IOE Twins 1915-1923

Mostly missing or replaced with a makeshift solution. Reproduction of the rear muffler support bracket which bolts to the frame.

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OEM Type Exhaust Clamp Sets

Exact reproductions of exhaust clamps for mufflers and pipes. These work with original or similar exhaust systems.

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OEM Type Exhaust Clamps for Muffler

Exact reproductions of exhaust clamps for mufflers and pipes. These work with original or similar exhaust systems.

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OEM Type Exhaust Clamps for Header Pipes

Exact reproductions of exhaust clamps for mufflers and pipes. These work with original or similar exhaust systems.

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The GasBox Rear Clamp Reinforcement

Small plates which are used as reinforcements for the rear muffler hanger. They were used by the factory until model year 1941. However, they fit and make sense up to 1957

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Seal Rings for Header Pipes: IOE models

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