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  1. I need help with my slower grom!

    Grom Performance
    Hey guys, I'm new to the forum and this is my first post so I apologize if this topic has been discussed. I did a couple upgrades to my grom all at once and I'm not sure what couldve went wrong. I put in the high rpm/colder spark plug, tbr full exhaust and did a valve adjustment on the same day...
  2. Before and after clip of Two Brothers Racing S1R Exhaust

    Grom Performance
    Got my TBR full exhaust installed. Super easy install. It is definitely wayyy louder than stock. I don't think the video does it justice. I feel a lot safer now that cars know I'm there.
  3. How likely to get pulled over with Two Brothers exhaust?????

    Grom Builds
    Hello. I just picked up a black Grom over the weekend and am looking at replacing the exhaust with a Two Brothers full system. I have seen the videos of the exhaust on You Tube but it is hard to actually tell how loud they are. I am looking for input from anyone that has the TBR system and if...