The venerable S58 found in the G8X M3 and M4 follows BMW's tried and true formula of six cylinders in a row sending power to the back wheels for maximum tire-torturing fun. From the factory, the S58 cranks out up to 503 horsepower and 479 lb.-ft. of torque, but the two turbos tucked next to the engine whisper a tale of limitless possibilities with every shove of the throttle. If you can't hear them, it might be time to let them whisper a little louder with this performance charge pipe from Mishimoto.----The stock M3/M4 charge pipe has the crucial job of transporting boost from both turbos to the intake manifold and intercooler so it can be turned into power by the engine. Looking at the stock charge pipe, however, you might not think BMW thought this was particularly important. Two rubber hoses carry that precious boost out of the turbos and into an (ugly) plastic merge before it enters the intercooler. Some owners are already seeing cracks and failures of this plastic merge on M3s and M4s pushing more boost. Luckily, Mishimoto has a solution.----The Mishimoto G8X M3/M4 performance charge pipe replaces the stock rubber and plastic with robust silicone and cast aluminum for a charge pipe that's stronger and 27% less restrictive than stock. Our charge pipe retains the flexibility of the stock front section but replaces the stock rubber hoses with durable silicone for greater heat and pressure tolerance. The plastic merge has been replaced with cast aluminum for a significant durability upgrade, while the transitions have been smoothed to allow improved flow to support future performance upgrades.----This performance charge pipe is a direct fit for your 2021+ BMW G8X M3/M4 and is backed by our Mishimoto Lifetime Warranty for a lifetime of letting your legend breathe free. So, if you're ready to unleash the limitless potential of your M3 or M4, this Mishimoto performance charge pipe is for you.