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Home About Us View Feedback Contact Us Velocity Stack Kit for R1 5VY Throttle Bodies, All Lengths danST Engineering are pleased to offer this high quality velocity stack kit for the Yamaha R1 5VY throttle bodies. The kit consists of the following:   4x Flange fitment 50mm Diameter Spun Aluminium trumpets available in 25/50/90mm Lengths 2x R1 5VY adapter plates (mount on existing holes within the R1 TB casting) 8x M6 Button Head Screws 6x M5 Countersunk Screws   A dimensional drawing of the available trumpet sizes can be seen here: Velocity Stack Dimension Drawing This kit has been designed for anyone running the bike throttle bodies without the original airbox arrangement - particularly in kit or modified car applications. A pipercross PX500 or PX600 with the appropriate baseplate