Brocks Performance Alien Head 2 Full Exhaust System Honda Grom 125

Brocks Performance Alien Head 2 Full Exhaust System Honda Grom 125

SKU #: BP-1001
Brock's Performance Alien Head 2 full exhaust system for Honda Grom 125 / MSX 125! Brock's Exhaust system offers a 60% weight savings combined with almost 20% more power*! (*When combined with (optional) Dynojet PCV, Brock's mapping and mild air box mods - instructions included.)
$399.00 In stock


Availability: In stock

Brocks Performance full Stainless Steel with Alien Head Muffler! The Alien Head™ Exhaust System combines our legendary race-proven performance with the distinctive look and sound of our Alien Head™ muffler. Our most popular exhaust system, Brock personally designed and hand-tuned the Alien Head™ Full Exhaust System to find the ideal balance of performance and attitude. Keeping our creative Grom owners in mind, this low-mount exhaust option was designed to tuck up tight along the engine to provide the most ground clearance available. Now you can stretch and lower your Grom without being restricted by your exhaust.


  • 12" megaphone muffler
  • Show-polished finish
  • Maximized power gains on stock and modified engines
  • 2" outlet permanent baffle
  • Larger diameter outlet provides increased exhaust flow
  • Distinctive look/aggressive sound (2” optional noise reduction insert sold separately)
  • Provides maximum ground clearance
  • Over 60% in weight savings
  • 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 packageAt no additional charge
  • Includes access to Brock's map support programAt no additional charge
  • Click here to view Installation Instructions
  • Click here to view Airbox Modification Instructions


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This product is legal for closed-course competition use only; for racing vehicles (a competition vehicle not used on public highways). Intended for off-road use or race purposes; may not meet regulations of pollution controlled roads or highways.