BMW 335XI N54 AWD CATLESS DOWNPIPES N54 AWD CATLESS DOWNPIPES Fits BMW 335XI Description Take your N54 powered BMW 335xi to the next level with ARM Motorsports 3" catless downpipes. The ARM N54 AWD catless downpipes eliminate the restrictive OEM converters on the stock downpipes allowing the exhaust to flow more freely, increasing power and torque. Because higher boost levels generate more heat, the ARM 335xi catless downpipes allows your AWD N54 to run boost settings of Stage 2 tunes and beyond. The ARM 335xi catless downpipes are designed with 3" stainless steel construction to optimize exhaust flow off the turbochargers and reduce to 2.5" to match up perfectly to the OEM midpipes. Our 335xi downpipes are designed specifically to fit your AWD N54 platform. Each downpipe has two O2 sensor bungs so the factory BMW O2 sensors can be remounted allowing the ECU to continue to monitor the air/fuel mixture via the exhaust. Because these downpipes are a catless design, an ECU tune or CEL fix will be needed to avoid a CEL from displaying on instrument panel.   RESULTS IN THE BOX Gain 25whp + 37wtq Improved Exhaust Sound 304 Stainless Steel Perfect Fitment ARM Downpipe Set New Gaskets Hardware Kit FITMENT GUIDE - AWD VEHICLES ONLY 2007-2010 BMW 335xi Coupe/Sedan/Convertible (N54 Only)   Click images to enlarge Pictures sell! Auctiva offers Free Image Hosting and Editing.250+ Listing Templates! Auctiva gets you noticed! The complete eCRATER Selling Solution. Track Page Views WithAuctiva's FREE Counter