*Please email us any special requests* To get some proper power and sound from your 2011-2013 BMW 335is, these downpipes unlock the full potential of one of the rarest factory-tuned N54 platforms BMW ever produced. The 335is ran an uprated twin-turbo N54 with a factory overboost function, and catless downpipes are widely considered the most impactful single bolt-on you can make. Each downpipe is a full catless design that opens up flow off both turbos, dropping back pressure significantly and bringing out the N54's full character. You'll feel sharper throttle and a much stronger mid-range pull, along with the unmistakable twin-turbo spool and whoosh that made the 335is such a cult favourite. It’s constructed from T304 stainless steel with smooth mandrel bends to handle the heat and hold up long term. We Stand Behind Our Products All items from us have a 1-Year Warranty! Specs Fits: 2011 2012 2013 E92 E93 BMW 335is I6 Turbo N54 Engine Material: High Quality T304 Stainless Steel Precision TIG welds for high strength and perfect fitment 100% Reversible, always able to go back to stock at any time *Comes with ALL necessary mounting hardware* Shipping FREE SHIPPING to the lower 48 States! 5-8 Business Days depending on location We ship all of our products through UPS or FedEx Current processing time (FOR FRONT RACE PIPES ONLY!) from when you place your Order to the Order being shipped is 5 Business Days We always recommend Professional Installation. Emissions Non-Compliance. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, hobby, or other off-road use. Its use is prohibited in any motor vehicle that is subject to emissions inspection or control. Legal in California only for racing vehicles that may never be used, or registered or licensed for use, upon a highway. DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only, never to be driven on public roads. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. We suggest pairing this product with racing software to prevent fault codes and check engine lights. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.