Jus got back from the ride. Reeds perform as advertised gains all across the board. I really noticed the grunt down low felt real snappy. Mind u guys my shee only has shearer pipes so b4 i put the 4s on i had hardly any bottom end, now its "there". On my previous banshee i went from stock to 3s and didnt notice as much as i did with the 4s i mean mods/set up was different but jus my opinion. Overall im pleased with he 4s