APR Race Downpipe and Midpipes for the Audi RS3
|Audi||RS3||8V / MK3||2.5 TFSI EA855 EVO||S Tronic||Quattro||LHD and RHD|
|Audi||TT RS||8S / MK3||2.5 TFSI EA855 EVO||S Tronic||Quattro||LHD and RHD|
The APR Race DP features a port-matched outlet connected to a smooth, 4” continuous-radius cast-bend, with an ultra-smooth cast-Y that splits the system into a dual 2.5” exhaust path. In contrary, the factory DP has a sharp transition exiting the turbo, which dumps directly into a massive and hot catalyst that keeps your engine bay toasty. From there the system splits into kinked piping, with less than ~2” of diameter on one side and ~2.3” on the other. The factory system wasn’t designed with ultimate performance in mind like the APR system.
The system is made from T304 stainless steel. The cast Y is electropolished, and all non-cast piping is mandrel bent with a brushed finish. As always, APR only uses argon-backpurged TIG welding techniques to assemble the systems.
The system features precision laser cut brackets with integrated PIM nuts for a reliable connection to the factory bracket. APR's CNC machined v-band and OEM-style 3-bolt-flanges are precision cut and extremely flat ensuring an accurate seal. They include new gaskets and copper plated nuts as well. Both O2 sensors bungs are cast and welded on top of the system in such a way as to prevent from protruding into the exhaust flow path. Lastly, APR uses OEM-style flex sections that are fully sealed with a corrugated inner liner for improved airflow. This design also resists billowing, rubbing, rattling and fraying, as is common with other types of flex sections.
APR Race Midpipes with Catalysts:
The APR Race Midpipes with Catalysts are both 2.5” and are designed as a simple plug and play upgrade. They use T304 stainless steel piping that’s brushed, mandrel bent, and TIG welded to the included catalyst and CNC machined ultra-flat OEM-style 3-bolt-flanges. The system includes new gaskets, bolts and copper plated nuts.
The system includes two proprietary 300-cell GESI high-flow catalyst, which are ideal for forced induction applications. They feature a fully captured substrate brick, which is furnace brazed to the outer mantle and physically captured by the diffuser cones. This helps to prevent rattling, rotation and damage to the substrate, especially on higher horsepower applications.
The APR Race Midpipes with Catalysts are compatible with the factory DP and Race DP. Race Midpipes (catted or non-catted) are required for Stage 2 along with the Race DP.
APR Race Midpipes without Catalysts:
The APR Race Midpipes are both 2.5” and are designed as a simple plug and play upgrade. APR uses T304 stainless steel piping that’s brushed, mandrel bent, and TIG welded to the included CNC machined ultra-flat OEM-style 3-bolt-flanges. The system includes new gaskets, bolts and copper plated nuts.
The APR Race Midpipes are compatible with the factory DP and our Race DP. Race Midpipes (catted or non-catted) are required for Stage 2 along with the Race DP.
The APR Race DP is compatible with the factory midpipes and our midpipes. This component, and APR Race Midpipes, is required for Stage 2.
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