Rid of the rasp with the Tone Dual X Pipe Midpipe for G8X M2/M3/M4. At Tone, we grew tired of the rasp and drone associated with typical S58 exhaust setups which is why we are proud to present our titanium Dual X Pipe system. The Dual X system Is intended for the those who desire the absolute loudest system possible and require the most flow. Available in both 2.75 inch and 3 inch configurations. Free shipping on all orders