- 14" megaphone muffler with brushed finish
- High mount system for increased cornering clearance
- 'Mini' Penta-Carbon muffler engineered exclusively for the Honda Grom
- Race system designed to complement DHM Big Bore Kit and OEM displacement engines
- Maximize horsepower output by pairing with our Short Ram Air Intake Kit with Sprint Filter
- Upgraded mounting flange for increased exhaust gas velocity
- Aerospace quality, ultra-lightweight stainless construction
- 2" outlet permanent baffle (glass wool/fiberglass) for long life and deep sound
- Distinctive look and aggressive sound (optional noise suppressor sold separately)
- Each muffler is hand-fabricated into a distinctive penta-diamond shape
- Customize with over 100 different color combinations
- Endcaps are produced by BST to ensure a perfect match to your wheels
- Pre-installed 18mm bung for wideband O2 sensor
- 39% weight savings vs. OEM full system
- Provides maximum ground clearance
- No fairing modifications required
- Not compatible with OEM rear fender
- Replacement exhaust pipe gasket recommended (available here)
- 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
The Brock's Performance Penta-Carbon™ Stainless Steel Full Exhaust System is like no other. Make it your own! The Penta-Carbon™ is designed to be customized to your specifications. The heart of this customization is a beautiful five-sided carbon fiber endcap produced exclusively for Brock’s Performance by world-renowned carbon composite specialists Blackstone Tek (aka BST Carbon Fiber wheels). Not only is the carbon cap available in gloss or matte finishes, we have also expanded the offerings to match any available BST carbon fiber wheel custom ink colors, for a combination that is truly unique. Check this link for more information on Xirallic®, the shimmering ‘Ink’ finish applied to produce subtle colors that explode in direct sunlight: BST Custom Ink & Finish Options
Don't have carbon fiber wheels yet? No problem, the colored end caps match the schemes of most brands: blue, red, and green… just to name a few.
'What about the pipe,' you ask? With sharp lines to match the aesthetic design trends of most modern sportbikes combined with the aggressive sound (hidden noise suppressor sold separately) Brock's exhausts are known for, the Penta-Carbon™ shape won't get lost in the crowd. If you like the sound and power of our Alien Head mufflers, you will love this modern take on Brock's legendary mindset.
Honda Grom Exhaust Weight Comparison:
OEM Exhaust System (one piece):
- Full Exhaust: 7.50 lb.
Total = 7.50 lb.
Brock's Performance Penta-Carbon™ Full System:
- Muffler: 2.50 lb.
- Head Pipe: 1.45 lb.
- Tail Pipe: 0.45 lb.
- Hardware: 0.15 lb.
Total = 4.55 lb.
Total Weight Savings = 2.95 lb. or 39% of stock weight
Honda Grom Exhaust System Decibel Levels
Testing procedure performed according to SAE J2825
Penta-Carbon™ Muffler:
Idle: 86dB / 2000 RPM: 84dB
Penta-Carbon™ Muffler (with Noise Suppressor):
Idle: 79dB / 2000 RPM: 83dB
