EVOLUTION RACEWERKS | Your Number One Source For N54+N55 Downpipes!

[Evolution Racewerks]

At Evolution Racewerks, we believe that customers should have the maximum flexibility of product selection and the choice to select products that suit each and every individual's needs; thus we are proud to offer all tested and proven downpipes on the market today!

We have in stock most, if not all, downpipe selections from Macht Schnell, AR Design, and Berk Technology.

Macht Schnell:
N54 Catless
Downpipe Features:
- 76.2mm overall diameter, eliminating restrictive factory pre-cats and crush bends
- 100% T304 Stainless Steel construction, using mandrel bends
- Precision TIG welded joints
- Heavy-Duty Stainless V-Band/Exhaust flanges
- Heavy-Duty locking fasteners and exhaust gaskets included
- Factory O2 locations retained with Stainless Steel bungs
- Pre-installed Stainless EGT bungs for easy thermocouple mounting

Thermal Coated:




AR Design:
N54 Catless/Catted/XI
Typical gains with tuning in the 30bhp range!
100% hand crafted in the USA from premium 304 Stainless Steel - flanges and O2 bungs included!
Water-jet cut 304 Stainless cat-back flanges, and CNC'd 304 Stainless V-Band flanges.
100% TIG welded, argon back-purged.
Set of our exclusive bomb-proof exhaust gaskets included.
Grade 10.9 Metric Hardware (145,000PSI tensile strength, C32-C39 Rockwell, Zinc Plated), and Nord-Lock positive locking re-usable washers included.
Factory location O2 bungs
Available with a 2000°F ceramic coating. Coatings come with a 3 year warranty against corrosion and rust to original owner.
Lifetime warranty against any manufacturing defects given to original owner.

Catless

Hi-Flo Race Cats

XI Fitment


N55 Catless

N55 with High-Flo Race Cats





Berk Technology:
N55 Catless
Ultra low backpressure 4" downpipe
23HP gain over stock at the same boost level with no tuning devices
30TQ gain over stock at the same boost level with no tuning devices
Straight shot design for zero restriction and high velocity
Largest possible tubing for quicker spool
Zero taper on flange at turbo for largest possible pressure differential
Largest downpipe on the market, uses more 4" tube than the competition
100% Made in the USA
Optional: Ceramic coatings normally used for race pistons for much greater thermal barrier protection compared to exhaust coatings



Please pm me or send all inquiries to JohnZhang@EvolutionRacewerks.com for special e90post pricing as well as installation combo packages.

[tracer bullet]

I'm familiar w/ cars in general, have even rebuilt engines. But not so familiar w/ exhaust systems, especially the 135i's.

Do you have any diagrams of the factory setup (setups that is, N54 & N55) and an indication of what part(s) these replace? Curious where they fit in the system.

Also CEL's - what can be expected with these installed, if anything?

[Evolution Racewerks]

Originally Posted by tracer bullet

I'm familiar w/ cars in general, have even rebuilt engines. But not so familiar w/ exhaust systems, especially the 135i's.

Do you have any diagrams of the factory setup (setups that is, N54 & N55) and an indication of what part(s) these replace? Curious where they fit in the system.

Also CEL's - what can be expected with these installed, if anything?

Downpipes are #1 and #2 in the diagram below. They are the biggest bang for the buck in terms of exhaust mods as they replace the restrictive catalytic converters to free up the exhaust flow. N55 engines are similar except that there is only one huge downpipe instead of two as in the N54.

As for the cel, aftermarket tuning companies are able to get rid of them should you choose to go catless.

[SoCali E36]

I am looking to purchase the berk DP but i have a few questions. Just some info, my 135 is all stock except for the berk full sport exhaust. 1. Will i need a tune in order for my car not to throw codes? 2. will i need any special sensors to fit into the bung holes? 3. how much is the berk DP?


if you could please PM an answer to those questions i would appreciate it cuz i rarely remember to come back to the thread to check. thaNKS!

[tracer bullet]

Thanks for the diagram and explanation!

[Evolution Racewerks]

Originally Posted by SoCali E90

I am looking to purchase the berk DP but i have a few questions. Just some info, my 135 is all stock except for the berk full sport exhaust. 1. Will i need a tune in order for my car not to throw codes? 2. will i need any special sensors to fit into the bung holes? 3. how much is the berk DP?


if you could please PM an answer to those questions i would appreciate it cuz i rarely remember to come back to the thread to check. thaNKS!

pmed!

Originally Posted by tracer bullet

Thanks for the diagram and explanation!

You're welcome! Let me know if I can help you with anything

[Evolution Racewerks]

orders shipped!