These are a bigger bore than the original 100M and on a full race or rally engine will give more power. The silencer is very large and therefore lasts a good length of time, with the choice of trouser it can be set up for the big bore or 100M manifold.

The trouser and tail pipe must be welded to the silencer to suit the car and therefore are unpainted. The front and rear outrigger must be modified and please note the manifold does not accept the original throttle linkage, it is recommended to convert to cable throttle.