Overview
Gen 2 to Gen 3 Hayabusa Full Exhaust Adapter Kit (sold separately) and muffler mounting bracket modification is required for Gen 3 Hayabusa (2022) fitment.
Includes a Spacer Kit (a $24.99 value) that 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
Pre-installed 18mm bung for wideband O2 sensor
3oz. tube of Permatex Ultra Copper® supplied with purchase
Includes (Emissions/PAIR) Block Off Cap and instructions for decel-pop reduction
C44 eliminator plug available here to prevent FI light following O2 sensor removal
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
Click here to view logo plate color options
Click here to view installation instructions
Click here to view PAIR block-off instructions
Note: If used on a Gen 3 Hayabusa the muffler mounting bracket must be modified to provide clearance for the rear brake lever (follow link for instructions).
The Follow-Up To Our Best-Selling Exhaust System
The Alien Head 2™ offers: A full through 2.25” diameter secondary section and bigger flange kit to take full advantage of state-of-the-art high performance aftermarket cylinder head porting techniques. These free-flow exhaust enhancements allow the performance curve to be moved up, via aftermarket ECU modifications when using a stock displacement engine, while also allowing larger displacement engines to breath freely – a must for the loyal Busa owner who’s serious about competing against today’s alternate brands of modern sportbike.
The Alien Head 2™ exhaust system combines our legendary, race-proven performance with the distinctive look and deeper tone than the original Alien Head™ muffler, which has become a favorite with custom builders to showcase more of today’s big tire/custom swingarms. Manufactured to stringent specifications, Brock personally designed and hand-tuned the Alien Head 2™ full exhaust system to find the ideal balance of performance and attitude for the stock to highly modified Busa.
The Alien Head 2™ exhaust system stands as the benchmark of cutting edge power, design, and style.
Dyno Chart: Click image to enlarge
SAE Scale
Alien Head 2™ Full System Weight:
Muffler: 3.05 lb.
Head Pipes (w/ flanges): 5.20 lb.
Collector: 1.50 lb.
Hardware: 0.40 lb.
Total = 10.15 lb.