These Mercedes E 63 AMG BiTurbo down pipes are among if not the best made down pipes you can get for your E 63 AMG BiTurbo. Made in the USA and out of 100% 16 gauge stainless steel, using 3 inch tubing. These E 63 AMG Down pipes are built to last. These down pipes are the key to unlocking the hidden power in your E 63 AMG BiTurbo. The kit includes all the hardware and clamps needed to get the job done. Options are available for an H-Pipe or X-Pipe. We can even fit a set of high flow cats into the system. With tuning gains can be well over 100 wheel horsepower and over 200ft lbs of torque!