http://www.n54tuning.com/index.php?_...&productId=179
Introducting the first N54Tuning Performance Line Power Combo. Take advantage of this great deal with HUGE discount when you bundle our super popular ER or Wagner F-Series Catless / Catted Downpipes with the best tune on the market.
Key Features:
Available for the 2012+ BMW 335i (F30 Chassis) N55 Engines!
Available for the 2013+ BMW 435i (F32/F33 Chassis) N55 Engines!
Available for the 2012+ BMW M135i (F20/F21 Chassis) N55 Engine!
Available for the 2013+ BMW M235i N55 Engine!
Power Combo Includes;
F-Series N55 JB4 (either PWG or EWG)
ER or Wagner F-Series Catless or Catted Downpipes
Optional Addons;
BMS USB Cable
BMS Flex Fuel / Electronic Wastegate Wires
The F Series (1,2,3,4 Series) N55 cars all share the same downpipe. When first introduced, the downpipes had a 3.5" v-band flange inlet on the turbocharger side. On 07/13, BMW decided to change the downpipe. This new downpipe featured a 4" v-band flange inlet instead. Thus, the previous downpipes are not compatible with the new ones.
Below is the breakdown on which downpipe to chose based on production date:
335i (U.S. Spec) - Up to 07/13 have the old downpipe (BM-EXH007) 3.5"
After 07/13 have the new downpipe (BM-EXH012) 4.0"
435i (U.S. Spec) - All 435i have the new downpipe (BM-EXH012) 4.0"
M235i (U.S. Spec) - All M235i have the new downpipe (BM-EXH012) 4.0"
M135i (European Spec) - Up to 07/13 have the old downpipe (BM-EXH007) 3.5"
After 07/13 have the new downpipe (BM-EXH-012) 4.0"
IF THE VEHICLE IN QUESTION IS BUILT ON 07/13, IT CAN HAVE EITHER DOWNPIPE. A VIN# CHECK SHOULD VERIFY WHICH DOWNPIPE IT IS. TO BE ABSOLUTELY SURE, A VISUAL INSPECTION NEEDS TO BE DONE. SINCE THE FACTORY PART# ON THE DOWNPIPES ARE DIFFICULT TO SEE, THE BEST WAY TO CHECK IS TO LOOK AT THE PART# ON THE BRACKET HOLDING THE DOWNPIPE. THE OLDER DOWNPIPES HAVE 2 STUDS GOING INTO THE BRACKET AND ATTACHED BY 2 NUTS. THE NEWER DOWNPIPE HAS 1 STUD ON TOP ATTACHED BY A NUT. THE BOTTOM BRACKET IS ATTACHED WITH A BOLT, NOT A NUT.