Arrow Racing Manifold Thruxton 1200

A pair of stainless steel racing manifolds for the Thruxton 1200 & SpeedTwin.

These manifolds replace the original manifold & catbox. The motorcycle can then be ridden without a catalytic converter. The original exhaust or any other accessory exhaust can still be used. By removing the catbox, the sound becomes significantly throatier. The manifolds also deliver more power than the originals with catbox. The performance measurements on the dyno rides (see pictures) were carried out with the rear silencers open.
Individual tuning of the motorcycle on a dynamometer is recommended. A power commander is then also required for tuning.

The manifolds are designed with an indifferent pipe. However, with Arrow this only serves as a holder (the manifolds are continuous and the pipe is closed - so there is no connection from the left to the right manifold). The manifold can be easily opened with a hole saw or a milling cutter (at the point where the indifference tube is welded on) and a connection can then be made between the two manifolds. We think this makes a lot of sense as it increases performance.