Known the world over under various names such as Velocity Stacks, Air Horns, Trumpets or Ram Pipes they allow you to "tune" you engine in a relatively simple way and this particular version is a 15mm "tall" top quality machined alloy bolt-on trumpet for 40mm diameter carburetors.
![15 mm long bolt-on trumpet for 40mm carburetors 15 mm long bolt-on trumpet for 40mm carburetors](../media/trans.gif)
So, these trumpets measure 15 mm in total length.
![15 mm long bolt-on trumpet for 40mm carburetors 15 mm long bolt-on trumpet for 40mm carburetors](../media/trans.gif)
Diameter at the flared end is some 57mm.
![15 mm long bolt-on trumpet for 40mm carburetors 15 mm long bolt-on trumpet for 40mm carburetors](../media/trans.gif)
They feature 65 mm stud centers and will fit, amongst others, the following carburetors:
This product is priced and sold as a single unit.