10-14 BMW 535i/ix640i/ix740i/Li F01 F02 F07 F10 F12 F13 N55 3.5″ Downpipe

Circuit Werks latest Turbo Downpipe for 2010-2014 BMW N55 X5 X6 740i/ 640i/ix 535i/xi/ 535i GT.  This Downpipe Will help with the sound of your N55 motor, smooth out the exhaust flow, and not to mention the additional performance gain.

By installing our Circuit Werks Downpipes, you will not only improve dramatically the sound of your BMW, but you will also gain the horsepower since it's not restrictive anymore where you would normally drive the car. Like to a local car meet, to work, or weekend cruising around town.  The sound will be slightly louder but once you step on it, you can hear the deep sport tune and depending on the exhaust you have.  Comes with a limited warranty from the purchase date.  High polished stainless steel, all are hand built to meet our high quality standard, then T.I.G. welded together.

 10-14 3.5" N55 535i/ix/535i GT 640i/ix 740i X5 X6 35ix  Turbo Stainless Steel Downpipe

Hand TIG welded 3.5" High Quality Stainless Steel

Smooth radius bends to decrease turbulence and increase flow.

Gains from 25-30hp with tune.

Fits the stock catback as well as all aftermarket catbacks.

This item fits the following BMWs:

2010-14 BMW X6 35iX E71

2011-13 BMW X5 35iX E70

2013-2015 BMW 740i F01

2012-2015 BMW 640i/ix F06 F12 & F13 Coupe & Convertible

2010-2014 BMW 535i GT & 535ix Gran Turismo F07

2010-2014 BMW 535i & 535ix F10 & F11