Alien Head 2 Full System 14" Muffler Hayabusa (99-20)

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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
  • 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

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

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  • 5
    Hayabusa Alien Head Exhaust

    Posted by Brad Mattei on Nov 5th 2019

    I am a Brock's dealer, and have sold dozens of these exhausts through the years. They fit well, make excellent power, and are extremely durable for a streetbike exhaust system. It is my first recommendation when customers ask about installing an exhaust system on their Hayabusas.

  • 5
    Best exhaust i ever bought!!!

    Posted by Blain Barnard on May 3rd 2019

    My 1999 hayabusa is a fire breathing animal and could feel the gains instantly from old twin pipes

  • 5
    Alien Head Full System, 14" for Hayabusa

    Posted by Brad Mattei on May 1st 2019

    I am a Brock's dealer, and have installed many different exhaust systems on Hayabusas. The Alien Head exhaust is by far my exhaust system of choice for a streetbike.

  • 5
    Full system alien head

    Posted by JAMES ANTONIO on May 19th 2018

    Great exhaust. Works well with the power commander. Nice sound and excellent performance.

  • 5

    Posted by My1971 on Jan 30th 2018

    Absolutely love, it sounds Mean! looks great, went from feeling like I was riding a cruiser to riding a race bike!! my neighbors hate my 3:00 am rides! haha

  • 5
    Alien Head 2

    Posted by Cruz on Jan 30th 2018

    I really love the sound and the performance of my 08 Hayabusa. The customer service was amazing. I will definitely recommend it

  • 5

    Posted by Gas Gas on Jan 30th 2018

    I like the Brock's Alien Head 2 and the sound. I'm very very happy!