The APR Axleback Exhaust Conversion is a direct bolt-on to an existing APR Catback Exhaust System and converts your valveless system to the APR Valved System with rear mufflers.
Quick Facts
- Direct bolt-on to existing APR Catback Exhaust System
- Converts valveless system to valved with mufflers
- T304 stainless-steel construction
- Argon-back-purged TIG welding throughout
- Single 3" to quad 2.5" mandrel-bent brushed tubing
- Ultra-smooth cast 3" to quad 2.5" splitter)
- Brushed-finished straight-through sound-absorption
- Cast valve housings and brackets for OEM electronic actuators
- Rugged and precise mounting brackets
- Low-profile design, suitable for lowered vehicles
- Larger diameter piping compared to stock
- Lighter weight compared to stock
- In-house design with world-class manufacturing and quality control
- Easy to install
System Overview
Our exhaust system uses larger piping compared to the factory exhaust system, yet weights several pounds less. We use 3" OD piping, which then splits to a dual 2.5" design. The factory system uses 2.5" piping, which reduces to 2.25" before splitting and reducing fruther, greatly diminishing the overall diameter of the system. Finally, our system’s 4" exhaust tips dwarf the factory tips, giving the rear of the vehicle a sportier look.
Component Details
Mufflers
The mufflers are responsible for tuning the exhaust note and do so without adding unnecessary restrictions to the system. The muffler features a straight-through perforated tube that’s tightly wrapped with stainless steel and fiberglass material. The mufflers have a beautiful brushed finish, and are tucked high in the exhaust tunnel, making them perfect for lowered vehicles.
Valveless System
For the more track minded enthusiasts where weight, sound and price point all are highly desired metrics, the APR Valveless system is available. In this configuration the axle back portion of the exhaust has the mufflers and valves removed. Weight drops considerably and the system becomes more aggressive. With the factory DP in place, the system is louder and more aggressive, but thanks to the center Helmholtz chamber, drone is reduced, giving a more pleasant, yet aggressive driving experience. However, when upgrading to the APR Race DP, the system transforms and becomes unapologetically raw with maximum aggression – A true track enthusiast’s dream.
Cast Splitter
We cast the axle-back splitter to maximize the system’s performance by keeping exhaust velocity high and back pressure low. This is accomplished by gradually splitting the system from a single 3" pipe to quad 2.5" pipes. The organically shaped casting allows us to make this transition gradually as to not disturb the flow of gasses. Furthermore, as this component is visible from the rear of the vehicle, we made sure form matched function with a beautiful surface finish, TIG welding, unique bracketry and brushed, mandrel bent tubing.
Valves
Our system features two valves that allow control of the volume of the system via the factory exhaust valve actuators. In doing so, the system can go from tame to aggressive instantly! Unlike pneumatic systems, and other common valves found in the market today, our system maintains identical OEM operation all the way down to the factory valve actuation angles. Furthermore, the system is fully compatible with exhaust remotes, allowing end users to manually open the system at the click of a button.
We cast the valve housings out of T304 stainless-steel. Internally the system uses CNC-machined T303 components and brass bushings, which have stood up to our extreme torture testing. All necessary hardware is welded into place and is designed to combat heat and vibration for years to come.
Brackets
Our brackets ensure a strong and precise fit, every time. With our design, you’ll never need to worry about the brackets sagging and losing their shape over time, or the post slipping out of the hangers. The brackets are rigid, exact in their position, fit snugly in place and are made to stand the test of time.
Tubing
We use T304 stainless steel tubing throughout. We brush and de-burr all pipes, use mandrel bending techniques to ensure the pipes keep a constant diameter throughout, and use argon-back purged TIG welding for a strong and attractive weld.
Tips
Our polished slash-cut 4" exhaust tips upgrade the rear of the vehicle dramatically. The motorsport-inspired tips tuck nicely into the factory valance, gently following the valance’s curves and demanding all the right attention in all the right places. We laser etch a small and discreet APR logo onto the top of each tip, and we use T304 stainless Torca AccuSeal clamps that bolt on with ease with hardware that rotates out of sight. Lastly, since the tips are removable, you can upgrade to any one of our optional tip designs at any time.
Clamps
Our system uses OEM-style low-profile slip clamps and T304 stainless-steel Torca AccuSeal clamps for the exhaust tips. Our clamp selection allows the system to sit high in the exhaust tunnel, as is favored by lowered vehicles, with ultimate compatibility no matter what Race DP you may have. The clamps make for easy swapping of the exhaust tips, and slide out of the way to make adding or removing the optional front muffler easy. Each connection point is strategically placed to ensure the system has minimal opportunity to rotate during install or during years of heavy driving.
DP Compatibility
We’ve designed our system to be 100% bolt-on with the factory exhaust DP and APR Race DP. There’s no cutting, welding, or finagling to get the system to fit. It simply bolts on thanks to the included reducer for use with the factory DP, and link pipe for use with the APR Race DP.
APR Catback (Setup 1)
Axleback Exhaust Conversion Application Guide| System | Make | Model | Generation | Part |
|---|
| APR Axle Back Conversion with Valves | Audi | S3 Saloon | MK3 (Typ 8V) (Pre & Post Facelift) | CBK0035 | |
