Graves motorsports airbox velocity stack kit Yamaha R1 + FZ1 AB012 FI2000R Fuel Processor 5 @ 5000 rpm /

5 @ 5000 rpm / Graves Slip-on DB @ Idle 85 and 103 @ 5000 rpm

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After five years of development we are proud to release the best auto-blipper available

A great choice for adventure-touring bikes and other machines with large controls that hinder the mounting of traditional handguards

Mounts to all off-road competition bikes (motocross and enduro) with inner size from 13

Graves motorsports airbox velocity stack kit Yamaha R1 + FZ1 AB012 FI2000R Fuel Processor 5 @ 5000 rpm /Graves Motorsports Yamaha R1 FZ1 Velocity Stack Kit. The Graves Motorsports YZF R1 and FZ 1 Velocity Stack Kit is specially designed to suit the new fuel injected Yamaha Motor. The kit of 4 injection molded plastic intake stacks mount directly into the stock airbox without modification and is designed to smooth out the power curve, increase horsepower throughout and improve fuel efficiency. Power gains of 4 HP in the mid range and 2 HP at the top end