TheP&L Motorsports BMW E90 335d Cat-Back Exhaustis constructed of full 3″ T304 stainless steel piping and custom CNC cut T304 stainless flanges. Our unique design effectively separates exhaust flow to minimize backpressure and increase horsepower. Incorporating an in-house mandrel-bent design which allows for custom bends and lengths for improved consistency and fitment.This system features a fully muffler-less design in order to help reduce the amount of turbo backpressure, while still allowing for excellent sound output and tone. Designed, tested, and fabricated in-house from start to finish, this cat-back exhaust is finished by matching 3.5″ polished and rolled end tips. All P&L fabricated exhausts come standard with our 3-year limited warranty.