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Brock's Alien Head 2 Full System Black 14" Hayabusa  99-20

Brock's Alien Head 2 Full System Black 14" Hayabusa 99-20

Brock's Performance
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  • 14" megaphone muffler
  • Black ceramic coated 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 (PAIR/emissions) block-off cap and instructions for decel-pop reduction
  • 3 oz 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/track maps (race fuel) via our map support program at no additional charge

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 Hayabusa owner who’s serious about competing against today’s alternate brands of modern sportbikes.

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 Hayabusa.

The Alien Head 2™ exhaust system stands as the benchmark of cutting edge power, design, and style.

.Now fits all years of Hayabusa when using the included  Spacer Kit (a $24.99 value.)

Spacer kit allows a Gen 2 Hayabusa (08-18) 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.

 Please message your plate color choice as in picture including 'STUPID FAST


 Reviews 5*

Alien head exhaust

Posted by Kenney on Nov 17th 2018


Excellent quality!!! Love the sound and performance gain! Brocks map support really makes this the best hands down exhaust to buy for your money!!!



Alien Head 2 Exhaust

Posted by Corey on Jan 30th 2018


I have owned my second busa now for almost two years now and have done a ton of research and was saving up and wanted this exhaust. I was thrilled. Its every thing I wanted. Power, sound and along with the pair valve mod for decel pop, it is perfect! The power it brings to the Busa is just outrageous!!! I'm dying to see what it is putting out for rear wheel horse power.throttle response to power is smooth and I cant stop revving up my bike to hear the sound. Very happy customer! ! A++++++



Best Exhaust - Hands Down!

Posted by Ben on Jan 30th 2018


I've owned my Hayabusa for going on 5 years, but it wasn't until I installed my Brock's exhaust that I really started to enjoy it! It's got a great low rumble to it and really boosted the performance! Thanks for a great product.



Great Exhaust

Posted by Cory on Jan 30th 2018


This is a deep, loud, fast pipe. Light weight, and super cool looking. Only complaint is that it causes a ton of decel pop. Even after plugging the PAIR valve. Not a big deal. Good quality product as usual from Brock's.



Stupid Fast!

Posted by Mike on Jan 30th 2018



I have to say I love the sound and power of this system. I was even more impressed with the fit and over finish of the system. This system having the new larger header pipes and muffler really fit like a glove. I wouldn't run anything else on my bikes but a Brock's System...