We worked directly with Hotlap to develop a couple exclusive Honda Grom options that you cannot get anywhere else; all with that same HotLap quality. It has the signature HotLap unique bends at the header that adds a really nice look to the front of the bike; but also looks really unique in general. These pipes all perform with a nice deep growl! This pipe is compatible with the stock 125cc engine; and also capable of performing with Big Bore Grom motors. HotLap uses this size pipe for Japanese scooters up to 250cc and has great results.