Now fits all years of Hayabusa when using the included Spacer Kit (a $24.99 value.)Spacer kit allows a Gen 2 Hayabusa Alien Head 2 exhaust to be used on a Gen 1 Hayabusa (99-07) without any permanent modification. Spacer kit not required for Gen 2 models.
14" megaphone muffler
Show-polished finish
High flow flange kit
Maximized power gains on stock and modified engines
2.25" outlet permanent baffle
Larger diameter outlet provides increased exhaust flow
Distinctive look/aggressive sound
(2.25” optional noise reduction insert sold separately)
No fairing modifications required
Aerospace quality, ultra lightweight stainless construction
Includes (Emissions/PAIR) Block Off Cap and instructions for decel-pop reduction
3oz. tube of Permatex Ultra Copper® supplied with purchase
Includes Brock’s lifetime direct support package 
At no additional charge
Select from increased drivability/fuel mileage (pump gas) or race-proven (race fuel) track maps via our map support program 
At no additional charge