MWR Velocity Stacks for the Yamaha MT-09 / Tracer 9 (2021+), XSR900 (2022+), and YZF-R9 (2025+)

The Velocity Stacks are two-piece and able to attach them neatly and properly into the airbox, for this we have also designed a click system so that everything stays securely in place when mounted

The set consists of three velocity stacks, 1x Right (R) 1x Middle (M) & 1x Left (L).  No Modifications needed to air box

Instructions to unlock the trumpets :

(L) trumpet must be placed on the left side, (R) trumpet on right side and the lowest trumpet in the middle. The stacks are two-piece and able to attach them neatly and properly into the airbox, for this we have also designed a click system so that everything stays securely in place when mounted.

To unlock the trumpets you need an L-key or Allen key of 2.5 mm . On the inside of the trumpet you see a small hole, here you have to insert the L-key, now you have to push and turn at the same time , trumpet (L) clockwise and trumpets (R) & (M) counterclockwise.

Instructions to lock the trumpets:

Place a lip on the bottom half in the slot of the airbox for centralization in the middle. Place the top half with the pins in the slots and turn until you hear and feel the click. Tighten trumpet (L) counterclockwise and trumpet (R) & (M) clockwise