【CBX400F】規制前RPM管に交換するついでに当時物4-1管とのマフラー音比較してみた🔥編

I just got my car through inspection, so I'm installing a pre-regulation RPM muffler that I was given. While I'm doing this, I'm also comparing the sound with the original 4-in-1 collector pipe that came with it! !! The bonus video features the Throughmaker channel 💁 ​⁠🔥​⁠ @true_maker 🔥 Please check it out! I'm on Instagram 🙌 My story is updated daily! https://instagram.com/jaston_autocust... Opening Song: "JAST.ON's Theme" by Throughmaker BGM: "You're doing it, aren't you? Yes, you are!" by Danish Ogura (Throughmaker Group) Check out Throughmaker's music here! https://www.tunecore.co.jp/artists?id... #cbx400f #RPM muffler #vintage #P-pipe #cbx #honda #bosozoku #vintagecarclub #cbr400f #usedhonda #juston #honda #hondabike #manifold #421muffler #mufflersound #mufflerreplacement #mufflersound #pre-RPMregulation #cbxcall #vintagecar