S58 G8X Equal Length MidpipeFix the sound BMW left uneven. From the factory, the S58s twin turbo layout routes exhaust gases unevenly. The front turbos exhaust path is significantly longer than the rear, causing the gases to merge out of sync. The result? The raspy, unbalanced tone many G8X owners notice and dislike. Our Equal Length Midpipe corrects this by equalizing exhaust flow before it reaches the axleback. By matching exhaust gas timing, the engine is finally allowed to