K & N Air Filter - EX400 Ninja KA-4018 Custom Air Cleaner Assembly — Round/Open Includes proper number and thickness

Includes proper number and thickness of friction plates

The muffler section uses a PowrFlo 4

Setup as sold (4 across the row) or with a combination of your OEM stacks for two separate power characteristics

Fitment: Yamaha R1 1998-2017 + Yamaha R6 1999-2017 + Yamaha R6S 2006-2009

Note: This "Bike Side" kit listed here and separate listing for the "Bench Kit" do the exact same thing

K & N Air Filter - EX400 Ninja KA-4018 Custom Air Cleaner Assembly — Round/Open Includes proper number and thicknessFits directly into OEM airbox with application specific Sealing Bead to ensure a precise fit Fuel management modifications are not required for increased performance Pleated media provides a large filtration area offering long service intervals Designed to provide increased performance Made in the U. S. A.