$545.00
SALE: $490.50
Model #BM-EXH008S
This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.
Purchasing this product requires you to sign our Vehicle Compliance Waiver here.
Introducing our new Competition Series 4" Downpipes for your N20 four cylinder turbo engine!
Our 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 4" 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 4" and the factory exhaust system is 2.5", the factory downpipes reduces size using short transitions from 4" before the catalytic convert and 2.5" 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. This results in less exhaust turbulence and backpressure which again improves throttle response and increase turbocharger spool times (less turbocharger lag).
Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars. Thus, removing as much exhaust flow restrictions will increase horsepower and torque significantly. The factory catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction. The factory catalytic converter is made up of catalyst material formed into "honeycomb" weaves. Exhaust gas must pass through these tiny "honeycomb" weaves on their way to the exhaust system thus causing a major exhaust flow restriction. It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction). By replacing the factory downpipe/catalytic converter with our Competition Series 4" Catless Downpipe, more power is unleashed! Our dyno testing has shown around 14-16whp average peak gains and upwards of 24wtq peak gains! While peak horsepower is nice to look at on dyno charts, what's more important is the power curve. If you look at the dyno charts, torque hits MUCH earlier and harder. The torque curve is BROADER throughout the RPM band. More usable power. You have more time spent in the RPM band with higher horsepower and torque. This equates to faster turbo spool up (less turbocharger lag) and better throttle response. Bottom line, faster. You will feel the difference instantly.
The factory downpipe utilizes a flex bellow section that allows the exhaust system to move. This eliminates undue stress on the exhaust components like the exhaust system, downpipe, turbocharger and exhaust manifold. Many of our competitors do not feel it is important to keep this. While you do not see any adverse affects right away, over time, the stresses caused by not having a flex section and having a rigid exhaust system will cause premature wear and tear. Any stress failures like cracks will form quicker than usual on exhaust manifolds and exhaust components. Also, without a flex section, the exhaust system cannot properly deflect impact. Especially on lowered cars, whenever the exhaust system contacts the ground, the entire system gets pushed up. Without a flex, you can imagine how much stress is put into exhaust components like the exhaust manifold when the exhaust is pushed upwards. We fully understand that durability of our products is important. Thus, like BMW, we incorporate a flex section into our downpipe. Our flex sections are 100% stainless steel (cheap flex sections only have stainless steel center braids and steel caps) to ensure corrosion resistance.
We also retain the exhaust hanger like the factory downpipes to help support the weight of the exhaust system.
Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system. There are no compatibility issues whatsover. The downpipes will come by default with either brushed or polished finish.
Fitment:
WARNING: Cancer and Reproductive Harm
Make Vehicle | Model | Submodel | Year | Engine | Notes |
---|---|---|---|---|---|
2011-2019 BMW 528i |
528i | 2011-2019 | |||
2011-2020 BMW X1 |
X1 | 2011-2020 | |||
2012-2022 BMW X3 |
X3 | 2012-2022 | |||
2011-2016, 2019-2021 BMW Z4 |
Z4 | 2011-2016, 2019-2021 |
Evolution Racewerks started out as a custom fabrication shop in 2004. Its experienced staff of fabricators and welders can virtually craft any part that you want. Evolution Racewerks’ talented welders (TIG & MIG) are skilled at working with aluminum, stainless steel, and titanium. The company takes pride in helping petrolheads build their dream race car from the ground up. Evolution Racewerks has you covered from the beginning stages of chassis preparation, which includes steam welding and roll cage construction, to the complete assembly of the car.
If you dream it, Evolution Racewerks can build it. The company specializes in a number of different areas that all come together to create automotive works of art. Evolution Werks’ experienced technicians can install just about any part you may have. Nothing is impossible with the team’s custom fabrication, tuning, and suspension skills. The brand is known for fabricating custom welded (TIG & MIG) steel, stainless steel, aluminum, and titanium parts. As aforementioned, Evolution Racewerks’ specialty lies in roll cage assembly and chassis welding, as they have built numerous roll cages to meet all racing rules set in place by sanctioning bodies. Whether it is NHRA drag racing, SCCA, drifting, or road racing, Evolution Racewerks can do it all.
Evolution Racewerks takes pride in being a one-stop shop for building, servicing, and pit crewing for your race car. It boasts years of experience building race cars for its customers, many of which brought home trophies and were featured in several magazines.
Vivid Racing has an extensive inventory of Evolution Racewerks products that will enhance the look, sound, and performance of your vehicle. We carry intercoolers and intercooler pipes, catted and catless downpipes, oil cooler upgrades, charge pipe kits, brake lines, and more! If you have any questions regarding the parts listed above or about Evolution Racewerks, please contact our sales team at (480) 966-3040.