Quick Links: Here are your required Tuning options *** This requires the SCR Cat delete *** Description Increase the performance and reliability of your BMW 335d by eliminating the restrictive Diesel Particulate Filter (DPF) system, thus allowing the exhaust to flow more freely. This DPF Delete downpipe is built to last with 304 grade stainless steel and the world's most reliable aftermarket flex pipe. Rawtek has engineered this downpipe to be as good as it can be. From the laser cut turbo flange to the large 3.5" OD constant diameter tubing that ends in a concentric reducer to bring it down to 3" OD, nothing will outflow this downpipe. For bulletproof reliability in even the most severe environments and to help reduce under hood temperatures and noise, we build these downpipes twice as thick as anything else on the market. Yet another reason we can offer a lifetime warranty that we’re confident you’ll never have to use. Installation time Installation time will vary greatly based on experience, know-how and having the right tools and lift, so please take the following prediction with a grain of salt. This is simply a general idea of how long it could take in an ideal situation: Around 6-8 hours. Benefits & Features Benefits:  ***When combined with required software*** Up to 342 whp Up to 504 wtq  Longer turbo life (no more DPF) Features: 304 stainless steel 3.5" OD 11 gauge tubing Stainless steel installation hardware included Fitment: Will fit the following North American spec vehicles with DPF (diesel particulate filter): BMW 335d (2009-2011)