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APR

APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS

$499.99

APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS
APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS

APR

APR STAGE III/III+MIDPIPE KIT FOR AWD 2.5 TFSI TT RS and RS3 -- Audi (Mk2) RS3 & TT RS

$499.99

Stage III/III+ Midpipe Kit

This part is only necessary if an APR Stage III/III+ Turbocharger System was purchased and the vehicle does not have an APR downpipe. The kit includes a midpipe with catalyst, reducer and clamps. The turbocharger systems include the necessary components to connect the midpipe to the turbo.

Piping 

The APR Downpipe Exhaust System features premium grade T304L stainless steel for its excellent appearance, strength and corrosion resistance properties. The pipe is rolled to the 76mm European standard diameter with a 1.5mm wall thickness and a seemingly non-existent weld seam.

Pipe is cut to length in-house via APR's CNC-controlled bandsaw to an accuracy of .25mm, ensuring a precise fit. Each pipe is de-burred, and the exterior finish is brushed to give the exhaust piping a clean and attractive appearance worthy of the APR name. APR’s fabrication team uses argon back-purging during the welding process, leaving a clean and smooth interior surface, and TIG welding for strength and appearance. Lastly, no swedging or slip-fitting is necessary due to APR’s OEM-style clamp design, leaving smooth and less turbulent connection points.

Catalyst 

APR’s engineers specified a high-quality and high-flow GESI metal 300-cell catalyst ideal for forced induction application. During dyno testing, the 100mm x 100mm design showed no measurable loss in power, thanks to the catalyst’s specifications.

Internally the catalytic converter features a proprietary blend of precious metals and loading technology that helps to reduce emissions and smell common on cat-less setups. With performance in mind, the catalyst is placed far away from the turbo outlet to reduce turbulence in the downpipe and to help reduce under-hood temperature. The low-profile catalyst features a fully captured substrate brick, which is furnace braised to the outer mantle and physically captured by the diffuser cones preventing rattling, rotation, and damage to the substrate. Subsequently, a byproduct of running the catalyst is a reduction in noise, making the system as a whole more pleasing to the ear.

Reducer

A removable, T304L stainless steel split reducer, featuring smooth transitions, is included, making the APR Cast Downpipe Exhaust System directly compatible with the OEM catback exhaust system.

Clamps 

APR’s engineers specified a T304L stainless steel, OEM-style exhaust clamp designed to eliminate the need for flanges, swedging, or slip fittings. By using this low profile design, the exhaust system can be positioned higher in the exhaust tunnel and away from the ground with better clearances compared to flanged setups. Each clamp allows for less turbulence and greater accuracy at the connection points as the pipes simply butt up to one another rather than the ambiguity and voids associated with swedged slip fittings. Furthermore, the clamp doesn’t rely on deforming the pipe to provide a tight seal, making install and removal more convenient.

 

 

 

APR Cast Downpipe Exhaust System for the 2.5 TFSI TT RS and RS3!

APR is pleased to present the ultimate Cast Downpipe Exhaust System!

Upgrading the restrictive factory downpipe with the APR Cast Downpipe Exhaust System is a great way to increase performance and add a sophisticated growl to the exhaust note. Ideal performance is achieved through expelling exhaust gasses at maximum velocity through APR’s proprietary, low-turbulence, investment cast downpipe. Designed and assembled in-house, the system utilizes only premium materials and world-class manufacturing techniques to deliver unmatched quality and reliability.

Quick facts:

  • Designed and assembled in-house.
  • T304L stainless steel construction.
  • Argon back-purged TIG welding.
  • Investment cast downpipe.
  • 119mm bellmouth inlet with integrated flange.
  • Low profile, sealed/corrugated flex section.
  • 76mm outlet with integrated bracket.
  • 8mm billet bracket.
  • 76mm brushed and de-burred piping.
  • Non-swedged/slip-fit/flanged piping.
  • Investment cast o2 bung.
  • 300 cell, 100mm x 100mm GESI catalyst.
  • OEM-style slip-on clamps.
  • Split reducer for OEM catback compatibility.
  • APR Stage II ECU Upgrade price waived.
  • Limited lifetime warranty.

The factory downpipe system consists of smaller, 60mm piping with varying bends and multiple restrictive high-cell-count catalysts, all of which contribute to a less than ideal flow path and hindered performance. APR’s engineers took a multi-step approach to maximizing flow, reducing under hood temperature, and eliminating unnecessary restrictions all in a unique package only APR can deliver.

Detailed component photos and information

The APR Cast Downpipe Exhaust System is a complex system designed to deliver maximum performance. Each component was designed and developed with the absolute best in performance, strength, reliability and quality in mind.

APR’s engineers specified a T304L stainless steel, OEM-style exhaust clamp designed to eliminate the need for flanges, swedging, or slip fittings. By using this low profile design, the exhaust system can be positioned higher in the exhaust tunnel and away from the ground with better clearances compared to flanged setups. Each clamp allows for less turbulence and greater accuracy at the connection points as the pipes simply butt up to one another rather than the ambiguity and voids associated with swedged slip fittings. Furthermore, the clamp doesn’t rely on deforming the pipe to provide a tight seal, making install and removal more convenient.

Dyno Testing

APR dyno

Reported wheel figures measured on APR's in house Dynapack Dynamometer with a 2012 TT RS 6MT using SAEJ1349 correction and an average of multiple runs. Crank figures estimated based on the measured wheel figures. Results will vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, and other modifications.

The APR Difference

The Engineering and Designing Phase

In the past APR worked with other manufacturers to develop a limited range of private-label exhaust systems outside the scope of APR’s internal development and manufacturing capabilities. Understanding the limits of such a program, combined with APR’s desire to deliver higher-quality products in a timely manner with better customer support, APR invested in internalizing the program. With the release of this exhaust system and the others like it, APR is pleased to present our first systems fully designed and engineered in-house from the ground up!

Design and development begins with the use of APR’s professional grade in-house coordinate measuring machines. APR’s engineers have full access to a Romer Absolute arm with integrated laser scanner, FaroArm and Creaform 3D laser scanner for collection of special constraints surrounding the factory exhaust system. The engineers scan the vehicles and create detailed 3D maps of their design environment while designing each system in PTC Creo 3.0 CAD software.

Using APR’s in-house stereolithography 3D printer, rapid prototypes are created for fitment on the vehicle. The design is easily and quickly verified, and if necessary, changes can be made. Once adequate clearances and fitment is confirmed, especially in areas that move under load, physical quick-cast prototypes are created and fitted for final verification through real-world use.

APR’s world-class manufacturing partners from around the globe are responsible for manufacturing each component that falls outside of APR’s internal capabilities. Working closely with each manufacturer, APR’s engineers supply CAD models, materials specs, and other design specifications and work hand-in-hand with the manufacturer to develop the components. The end result is a collection of components, wholly unique to the APR name, awaiting final finishing, assembly and quality control at APR’s 78,000 square foot facility in Opelika, Alabama in the USA.

 

Application Guide
Vehicle Engine* Transmission Drivetrain Part Number Price  
Audi RS3 (8P / MKII) 2.5 TFSI All All Wheel Drive DPK0006 $1,199.99
Audi TT RS (8N / MKII) 2.5 TFSI All All Wheel Drive DPK0006 $1,199.99