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Two Brothers Racing S1R Honda Grom 125 Full Exhaust System ('14 - '15)

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Availability: In stock


Full exhaust system to give your Honda Grom excellent performance with bold sound and style.

One of our top picks for best exhaust around to fit the Honda Grom / MSX 125



The Two Brothers S1R Full Exhaust System is beautifully crafted from end to end. The header pipe is expertly welded with a new carbon wrapping around the muffler. Within it is a lightweight spiral-wound perforated core. A nice extra touch is also given to the mounting points with the CNC billet black brackets. A lot of thought went into this unit, from stock to the S1R, the weight is nearly cut in half from a hefty 11.15 lbs to 5.65 lbs (consider this weight loss a huge bonus instead of shaving it off from your own body!), and as every little bit counts, lightweight magnesium end-cap is used. Peak horsepower is increased from 8.65 hp to 9.5 hp! Peak torque is boosted from 7.62 ft-lb to 8.04 ft-lb. With a 125cc engine, you can really appreciate that extra torque. The S1R also boasts a nice beefy sound to get you noticed while still not being obnoxious. The S1R is a well-balanced exhaust to match the style and performance of the Honda Grom. Also included with the kit is a removable Two Brothers P1X Power Tip.

To help demonstrate the great craftsmanship of TBR, installation is a total breeze!

Cannot Sell In California. Check Local Laws Before Installing. Race Waiver Available In California.

Additional Info

Additional Info


» 10% horsepower increase 
» Reduces weight by 5.5 lbs
» New carbon fiber material
» Lightweight spiral-wound perforated core
» Machined spring retained connection
» High-performance packing material
» CNC billet black muffler bracket
» CNC billet machined outlet
» Lightweight magnesium end cap
» Includes a removable P1X power tip

Brand Two Brothers Racing


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