Upgrade your tone with the Tone Mega X Midpipe for G87 M2/G80 M3/G82 M4. At Tone We grew tired of the single midpipe drone and the equal length rasp which is why we are proud to present the Mega X. After months of R+D we have finally created the best sounding s58. Made with high grade SS304, the Tone Mega X midpipe offers a high quality sound from high quality materials.