I have a 2007 250ex. I want to add some power/pep and all around just help the engine run more efficiently.

I ride around my neiborhood into some open fields. So I dont need anything really loud. Ive heard soundclips of exhausts with silencers and theyre still loud.

Has anyone ever just bought a exhaust manifold and added a muffler from another bike that flows better than stock? For example a muffler from a 450r or ninja? If the size was right, wouldn’t this help expel exhaust gasses faster and still keep the noise levels closer to stock?

I have a 2007 250ex. I want to add some power/pep and all around just help the engine run more efficiently.

I ride around my neiborhood into some open fields. So I dont need anything really loud. Ive heard soundclips of exhausts with silencers and theyre still loud.

Has anyone ever just bought a exhaust manifold and added a muffler from another bike that flows better than stock? For example a muffler from a 450r or ninja? If the size was right, wouldn’t this help expel exhaust gasses faster and still keep the noise levels closer to stock?