Performance Velocity Stacks
This set of intake velocity stacks are designed to replace the factory VTR 1000 Firestorm/Superhawk intake stacks. I too ride a VTR 1000 and have had the chance to develop these stacks over the past year. Through many iterations, this design has been found to be the most successful in increasing airflow through the mid to high RPM range.
The stacks are 3D printed in nylon with 20% carbon fiber, this results in a very strong part that has excellent fuel, oil, heat and flame resistance. They are printed in-house to order. Both stacks are of equal length, standing at 72mm tall which is 5mm shorter than the tallest stock inlet stack. The finish texture is slightly rough much like the texture of the intake ports in the head. As picture the stacks have detachable retaining rings, these are designed to hold lateral force on the mounting bolts to stop them coming free. The lobes from the star shape of the rings sits above the other retaining screws and mitigates any loose screws from becoming free and being sucked into the intake. Unifilter foam squares are supplied to cover the catch can inlets if one wishes to delete the catch can from the airbox.
A direct comparison of stock intake stacks to these velocity stacks was undertaken. Modifications to the VTR 1000 used include; Leo Vince cans, Unifilter airfilter and manual cam chain tensioners. There are no modifications to the carburettors, but as you can see the bike was running rich.
At the maximum difference there is over a 6 horsepower increase, over 4 foot-pounds of torque increase and a far better fuel to air ratio. The power increases are substantial from 6000 RPM onwards. Of course, results may vary with each individual setup but feedback from customers has been nothing but positive.