本品为 宝马3系F30 F35 320i/Li 328i/Li N20发动机专用 美国ER改装涡轮后段Downpipe 排气头段/BMW N20 ER 4" Catless Downpipe
产地：美国 车型：宝马3系F30 F35 320i/Li 328i/Li N20发动机专用 安装：替换原车排气头段 性能提升：轮上16匹马力！
Evolution Racewerks is proud to introduce the very first downpipe out for the F30 328i! The stock downpipe in your F30 328i N20 is the most restrictive part of the exhaust system. Turbocharged engines are sensitive to restrictions, robbing horsepower and torque. The major culprit of the huge restriction is the factory catalytic converter; forming a maze of honeycomb weaves where the exhaust has to push through. Causing turbulence after the catalytic converter which causes the exhaust flow to slow down.
By replacing the factory downpipe/catalytic converter with this new Evolution Racewerks Competition Series 4" Catless Downpipe, all the restriction is released! +Dyno testing has shown around 14-16whp average peak gains and upwards of 24wtq peak gains! While peak horsepower is nice, for 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. This equates to faster turbo spool up (less turbocharger lag) and better throttle response. You will feel the difference instantly.
Evolution Racewerks Competition Series Catless Downpipes are constructed out of 100% 304 grade stainless steel and using mandrel bent piping and are 100% TIG welded. The factory turbocharger turbine housing utilizes a 4" V-Band flange which Evolution Racewerks have CNC machined out of billet 304 stainless steel.
Mesh Flex Section
The factory downpipe utilizes a flex bellow section that allows the exhaust system to move. Many other 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.
Horsepower gains of 14 to 16whp average (gains will vary based on modifications of your vehicle)
Higher Max Horsepower Power Curve
Torque gains of 16wtq average (stock boost) up to over 24 wtq (Software upgrade)
Higher Initial Torque Curve. Torque curve hits faster and higher and longer
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
Stainless steel flex section like factory that allows proper exhaust movement and flexibility
Mirror polish or brush 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
如有疑问欢迎致电查询：(工作时间) 010-63870600 / (非工作时间)13911376792