APR MK7/MK7.5 GTI Catback System - Front Muffler Only CBK0005 - CBK0005

Quick Facts

• 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 mufflers and Helmholtz frequency reducing resonator


• Polished 4" slash-cut exhaust tips (removable)


• Cast valve housings and brackets for OEM electronic actuators


• Rugged and precise mounting brackets


• OEM style slip clamps and Torca AccuSeal T304 tip clamps


• Direct fit to the OEM and APR downpipe exhaust systems with the included link and reducer pipes


• Low-profile design, suitable for lowered vehicles


• Larger diameter piping compared to stock


• Larger diameter tips compared to stock


• No increase in weight compared to stock


• Designed, developed, assembled and quality controlled in-house


• Easy to install


• Limited lifetime warranty

System Overview

Our exhaust system uses larger piping compared to the factory exhaust system, yet weights 5 lbs. less and 1 lb. less with the optional front muffler. We use 3" OD piping, which then splits to a dual 2.5" design. The factory system uses 2.56" piping, which reduces to 2.36" before splitting, greatly diminishing the overall diameter of the system. Finally, our systems 4" exhaust tips dwarf the factory 3.15" 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. Each unit features a straight-through perforated tube thats 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.

  
  
  

  The system comes standard with a single muffler with the option of adding our front triangular muffler at any time. The system sounds deep, throaty, and devoid of rasp and drone in all configurations. The single muffler setup will be perfect for most customers, especially those with the factory dp. When upgrading to a Race DP, or going to a larger turbocharger, the system gets louder. For those who want it quieter, our drop-in front muffler makes for an excellent upgrade.




• Axle-Back Components
  
  

  We cast the axle-back splitter to maximize the systems performance by keeping exhaust velocity high and back pressure low. This is accomplished by gradually splitting the system from a single 3 pipe to dual 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.




• Brackets
  
  

  Our brackets ensure a strong and precise fit, every time. With our design, youll 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 valances 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. Finally, because there are no flanges or swedges on the pipe, fitting the system to the factory dp, APR Race DP, or other Race DPs is a breeze. Theres no cutting, welding, or glaring compatibility issues, and there are no gaskets to replace.




• Hanger
  
  

  Weve added an extra bracket and associated rubber hanger to our main muffler to make use of an unused factory mounting point. This ensures the system installs snugly in place, without an opportunity to move, or rotate, under prolonged use.




• DP Compatibility
  
  

  Weve designed our system to be 100% bolt-on with the factory exhaust dp and APR Race DP. Theres 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.

Created In-House

Our exhaust systems are proudly designed, developed, assembled and quality controlled in-house at the APR 78,000 sq.ft performance campus in Opelika, Alabama.

Sound Tests

Optional Tips

Our slash-cut single or double-walled exhaust tips upgrade the rear of the vehicle dramatically. The motorsport-inspired tips tuck nicely into the factory valance, gently following the valances curves and demanding all the right attention in all the right places. Each tip features an engraved APR logo. Each kit is sold as a set of two tips.