In the case of a superbike it's simple: just add an aftermarket exhaust. Something titanium and tasty, maybe. Or go classy with carbon. AkrapoviÄ? has released a spine-tingling video reminding us just why aftermarket exhausts - the brand's own to be precise - are so important. Watch, listen and try not to drool at the Honda CBR1000RR, BMW S1000RR, Yamaha YZF-R1, Suzuki GSX-R1000, Kawasaki Ninja ZX-10R, Ducati 1299 Panigale and Aprilia RSV4 being put through their paces on track.