I've used and currently have 5 air filters for gsxs 1000/ gsxs1000f. Some of these are for sale.
1) 🔥The K&n Street is best for a stock bike with no mods.. (Best fuel economy)
2) 🔥 🔥 Bmc Street is best with a slip on exhaust, or muffler box removed but cat still in place. Remove muffler box and you WILL NEED A FLASH OR PCV...
3) 🔥 🔥 🔥 Sprint p037 best with muffler box removal, with or without cat, or full exhaust... filter is waterproof
4) 🔥 🔥 🔥 🔥 Sprint p08 best for decat, or full exhaust ...
5) 🔥 🔥 🔥 🔥 🔥 🔥 🔥 🔥😁 Sprint P08f185 best for full exhaust AND if you want all out gsxs performance to the max (not a commuter) waterproof filter also.
Sprint filters are cleaned with compressed air. & No need for oil!