42 Draft Designs cat-back exhaust system for the Mk5 Volkswagen GTI is a simple modification that delivers substantial results. Built right here in the USA, these cat-back system will transform your GTI from a boring grocery hauler to a race-inspired daily driver.
This cat-back exhaust system includes everything necessary to replace your factory exhaust system from the catalytic converter to the tail pipe. Slip-fit systems attach using the OEM band clamp. Flanged systems are designed to bolt to our downpipe when available. Three additional options allow this system to be tailored to your tastes.
Note: Model years listed are based on US models. European model years may differ. If shopping for a vehicle sold outside the US please match chassis designation before matching model year.
The 42 Draft Designs 2.5" slip fit cat-back begins where the factory downpipe ends. A permanent reduction to 2.36" allows 2.5" piping to slide into the factory clamp for a leak-free fit. After the clamp a set of hangers slide into the factory hanger bushings and supports the piping as it bends into a Magnaflow muffler supported by an additional hanger. After the muffler a short bend ends at a CNC machined flange. This flange connection is adjustable allowing precise fitment of the tips. Piping leaves the flanges and routes neatly under the rear suspension. A precisely fabricated merge splits the 42DD 2.5" piping into two without disrupting flow. Hung neatly in the factory exhaust cutout sits a pair of high polished stainless steel tips.
42 Draft Designs exhaust tips are built and polished in-house. The 42DD 2.5" cat-back is available with the choice of single wall or double wall tips. Single wall tips are constructed from a single 3" tube. Each tip is angle cut and welded to a press-formed expansion then polished to a mirror finish outside and shined-up inside. Double wall tips are constructed from two tubes - an inner barrel and an outer barrel. The inner barrel is angle cut and press-formed to precisely meet the angle cut 3" outer barrel. Welding, smoothing and polishing gives these tips a powerful look up-close and from a distance. In either construction the tips are offset to follow the contours of the mk5 rear bumper.
Installation is simple, adjustable, and reliable. A permanent reduction allows use of the stock sleeve clamp. Precise design and fabrication routes 2.5" piping clear of heatshields. Adjustable flanges allow further adjustment if necessary, sealed by a double layer graphite gasket and locking hardware. A pair of collars allow the rear hanger to be locked in place. This means your tips will never slide.
The sound is sporty and refined - not too loud and not a hint of rasp.
42 Draft Designs now offers v-band connection flanges with the stainless steel exhaust systems. Compared to 3-bolt flanges, exhaust systems built with v-band flanges are easier to install and adjust. V-band connections don't require a gasket, and can be serviced with a single tool. Overall, v-band flanges speed-up initial install and race-day component changes.
These V-band flanges are CNC machined from 304 stainless steel. Using a male/female fitment specification for the flanges aids in sealing the connection. Due to the material cost and manufacturing time, v-bands will remain a premium option.