Ease of Installation: (1 Easy, 5 Hard) 3
**Does not fit N20 engine
CAUTION: This product is intended for OFF ROAD USE ONLY. Not legal for use on pollution controlled vechicles upon public highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA. THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHILES IN THE STATE OF CALIFORNIA. This does not affect any international customers.
One of the main features of ER's N26 downpipe is the CNC machined solid stainless steel billet ball joint. The factory downpipe uses a press formed process to produce the "ball" joint to connect to the factory exhaust. This process can be done very inexpensively when done in large productions runs. Unfortunately, the drawback of this press formed "ball" joint is that the interior of the pipe also mimics the outside. When exhaust flows through a pipe, the majority of the exhaust flow tends to stay on the outer edges of the pipe. Thus, when exhaust flows into the "ball" section, it goes into the valley created by the "ball" joint and then back up the other side. This creates tremedous amounts of turbulence in the exhaust flow right at that section. Turbulence in turn, slows down exhaust flow velocities as well as increase back-pressure. It's a well known fact that with turbocharged cars, you want the least amount of back-pressure while still maintaining high exhaust flow velocities. Why? Because low back-pressure and high velocities allow the turbocharger to spin faster. This equates to reducing turbocharger lag and faster spool times. Throttle response is also improved. ER had originally thought to use the same press form process to manufacture their downpipes. However, very quickly, they noticed this flaw to the process and decided to CNC a solid stainless steel billet "ball" joint. This allowed ER to keep the factory connection while keeping the interior of the ball smooth. This allows the exhaust to flow unrestricted through the "ball" joint. While this CNC solid stainless steel billet was very expensive to manufacturer, the motto at ER is "Performance, no compromises". Their in house testing showed that they did indeed have real world improvements with this new CNC billet "ball" joint and thus worth the extra costs. This is why the N26 downpipes do cost a little bit more than the N20 downpipes as the N20 downpipes do not have the ball joint system but use a traditional slip-fit design which is cheaper for ER to manufacturer.
Since ER is able to reproduce the factory "ball" joint v-band connector, their 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 brushed finish.
Ceramic Thermal Coating - The purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out. This keeps underhood temperatures lower and less heat absortion by nearby parts/surfaces. Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower backpressure. The ceramic coating also adds additonal corrosion resistance. ER utilizes the best ceramic coating possible. ER's thermal coating can resist up to 2000F of heat. It is available in black only (all the other colors cannot withstand heat that high).
Additional O2 Sensor Bung - An additional O2 sensor bung can be added so that you can easily add a wideband o2 sensor and gauges so that you can monitor air/fuel ratios. The additional O2 sensor bung will come pre-installed with a plug so that you do not need to run the o2 sensor right away.
Optional EGT (Exhaust Gas Temperature) Bung - An additional 1/8" NPT bung can be added so that you can easily add a EGT sensor and gauge. The optional EGT sensor bung will come pre-installed with a plug so that you do not need to run the EGT sensor right away.