Pictured here on the left is our standard Summerlands Chuffer. It is machined from solid brass to a design that has been proven, through extensive testing and customer trials, to give an excellent chuff.

The Chuffer itself consists of a jet within a narrow throat. This has our specially designed sounding slot, hand cut into the machined body. The body above the slot is machined out to give the maximum volume for resonance.

The Standard Chuffer itself is 48mm long and must be mounted within the chimney of the loco so that the slot is inside. This gives a secondary resonance which amplifies the sound. If it is mounted with the slot in the smoke-box, it muffles the sound. We also make a Short Chuffer, which is 43mm long for use in short chimneys such as that on the Roundhouse Taliesin and can make them even shorter to order.

The Standard Chuffer diameter is 6.35mm but we also make smaller 5.55mm and 4.76mm versions for narrower chimneys, 9.5mm ones for wide (14mm+ ID) as well as custom designed ones for odd shaped chimneys.

Our range of adapters, including the unique Roundhouse Twin-exhaust one, will allow you to fit a Chuffer in the correct position for maximum Chuff

Each Chuffer is machined by master Chuffer-Maker, Nigel Garrett - who also test blows every one to check for the purity of chuff ...... you think I'm joking don't you! Just ask him!


Technical Description



Roundhouse Twin-exhaust
This is a precision machined, brass adapter which is a push fit on to the two cut down exhaust pipes. This avoids the need for any silver soldering - it is just a matter of removing the smoke-box and following the straigtforward instructions.

Roundhouse Vale of Rheidol and Silver Lady
This is a single pipe adapter which is a screw in replacement for the factory exhaust.

Roundhouse Taliesin
This is not an adapter - the special, shorter Chuffer is silver soldered to the Z shaped exhaust at our works. Please note that this is a Special Order item and that it is not suitable for the early L shaped exhaust models where the exhaust pipe tilts, rather than swivels, in the chimney. If you have one of the early ones, you might like to contact one of our Chuffer-Fitters who can convert your loco.

Accucraft Standard fitting
These have the standard 3mm thread machined in brass on the bottom of a replacement exhaust. They are simply different lengths for the different models to optimise the position in the chimney - from the Ruby right up to the mighty K-28 (so far!) Fitting is straightforward - just follow the instructions.

Accucraft Shays
The 2 cyl Shay has a 5mm adapter to be a straightforward screw in replacement for the factory unit. The 3 cyl shay has a 4mm adapter and the narrower bore 7/32" Chuffer as the chimney stack is very narrow.

Accucraft Earl & Countess
This is similar to the other Accucraft adapters but it is supplied in two parts to overcome some variation in the angle of the exhaust thread. Full instructions are supplied.

General Purpose Fitting
These Chuffers have a simple tube to push fit over your existing exhaust pipe. They are available for 1/8" (3.2mm), 5/32" (3.96mm) and 3/16" (4.75mm) exhausts.
The length of the tube can be varied and is shown as a number at the end of the product code e.g. SCGP1-25 has a 25mm tube.


SCGP1 In Stock

  • Product Code: SCGP1
  • Availability: 3
  • £28.99

  • Ex Tax: £24.16

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