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ER Competition Series 4" Catless / Catted Downpipe (F30/F32/F33/F20/F21/M2 N55)

$495.00$420.75

Specification
Product CodeC1
ManufacturerEvolution Racewerks
Stock Level4
ConditionNew

Earn Reward Points: 420

Dollar Value of Points: $4.20

Our new Competition Series 4" Downpipes for your M2 and 2012+ 335i (F30 Chassis) six cylinder N55 turbo engine, 2013+ 435i (F32/F33 Chassis) six cylinder N55 turbo engine and 2012+ M135i (F20/F21 Chassis) six cylinder N55 turbo engine!

Key Features:
Available for teh BMW M2
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!
Better throttle response and faster turbo spool up times.
Mandrel Bent 4" piping. Smooth transition to the exhaust system.
100% Stainless Steel Construction
100% TIG welded for better quality welds
Precision CNC machined turbocharger V-Band flange.
Brush Finish (standard) or optional Polish Finish
Available with high temperature Black Thermal Coating to reduce underhood temperatures.
Optional - Additional O2 sensor bung for wideband O2 sensors (comes with pre-installed plug)
Optional EGT sensor bung for EGT gauges (comes with pre-installed plug)
Compatible with the factory or aftermarket exhaust systems.
Track tested durability.
Includes all hardware for complete installation.
Limited Lifetime Warranty.


Competition Series Catless Downpipes is constructed out of 100% 304 grade stainless steel and utilize mandrel bent piping. They are 100% TIG welded by our in house fabricators and built in the USA. The factory turbocharger turbine housing utilizes a V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods. The O2 sensor is positioned at the factory location. Since the outlet of the turbocharger is 3.5" and the factory exhaust system is 3", the factory downpipes reduces size using short transitions from 3.5" before the catalytic convert and 3" afterwards. Due to space needed for the cataylic converter, the factory downpipes reduce in size using very short transitions. Since our catless downpipes delete the cataylic converter, we have more space. Thus, we use very long transitions. These longer transitions allow the exhaust gas time to smoothly transition from the larger piping to the smaller. Also, since we utilize a larger 4" pipe right after the turbocharger, turbo backpressure is significantly reduced. This results in less exhaust turbulence and backpressure which again improves throttle response and increase turbocharger spool times (less turbocharger lag).

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.

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