• 12" megaphone muffler
• Black ceramic Armor Coat™ finish
• Maximized power gains on stock and modified engines
• 2" outlet permanent baffle (glass wool/fiberglass)
  for long life, deep sound
• Larger diameter outlet provides increased exhaust flow
• Distinctive look/aggressive sound
  (2” optional noise reduction insert sold separately)
• Pre-installed 18mm bung for wideband O2 sensor
• Provides maximum ground clearance
• 65% weight savings vs. OEM full system
• No fairing modifications required
• Aerospace quality, ultra lightweight stainless construction
• Note: Designed for use with OEM rearset, modification
  may be required for use with aftermarket rearset
• Includes Brock’s lifetime direct support package
  At no additional charge
• Includes access to Brock's 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 Airbox Modification Instructions

Sound Clip Preview:

Dyno Charts: Click image to enlarge

Full System + Short Ram Air Intake Kit (SAE Scale)

Full System + Modified OEM Airbox & Filter (SAE Scale)

Honda Grom (2017) Exhaust System Decibel Levels

Testing procedure performed according to SAE J2825

Alien Head 2™ Muffler:

Idle: 101dB / 3000 RPM: 107dB

Alien Head 2™ Muffler (with Noise Reduction Plug):

Idle: 93dB / 3000 RPM: 103dB