Over the years the Audi TT K04-020 turbocharger has proven to be a worthwhile upgrade on the K03 equipped mk4. Since there lease of a few bolt-on K04 turbocharger kits the DIY crowd has been scouring the TT classifieds piecing together kits for less. Until now,no bolt-on downpipe has been available which allows the TT 225 K04-020turbo and manifold to fit the mk4. Those days are over!

Our3" downpipe begins at the turbo with a CNC machined turbo flange and the tightest 3" mandrel bend possible. The remainder of our downpipe is CNC mandrel bent in one piece to add strength and eliminate unnecessary welds. A stainless steel flex section is used to absorb engine movement. After the flex section a CNC machined flange allows a 3"high-flow cat or 3" test pipe to be installed. We use Magnaflow catalytic converters for all of our downpipes. After the cat, a custom adaptor allows perfect bolt-on fitment to any aftermarket cat-back. We offer adaptors for stock sized exhausts, 2.5" and 3". The whole downpipe bolts together to ensure zero leaks and zero problems. We use triple layer graphite gaskets and grade 5 locking hardware for the tightest fit.

The modular nature of our downpipe allows the user to change configurations at anytime. For example, our downpipe may be purchased with a stock sized adaptor and connected to stock or any basic aftermarket cat-back exhaust. At any time a 2.5" or 3" cat-back can be installed using the appropriate adaptor. Our 3" cat-back systems are completely compatible with this downpipe allowing the possibility of a 3" turbo-back in any configuration. On race days the catalytic converter can be easily swapped for a test pipe.

Our3" downpipe is available in 6 configurations. Street series downpipes include a high-flow cat. Race series downpipes include a 3" test pipe.Each downpipe includes a cat-back adaptor. Our adaptors are available in stock size (2.15"), 2.5" and 3". Each downpipe is shipped complete with everything needed for installation. Additional adaptors, testpipe, cat section, gaskets, and hardware can be purchased separately at any time.