42 Draft Designs 1.8T 3" turbo-back exhaust systems combine their 3" downpipes and their 3" cat-backs for a perfect fit from turbo to tailpipe. Thanks to the modular construction of their downpipes, these turbo-back exhaust systems allow the user to switch between street series (w/cat) and race series (w/out cat) at any time.
Though the construction of 42's downpipes and cat-backs remain the same, we can discuss one feature unique to their 1.8T 3" turbo-back systems - power gains. In their extensive testing they were able to dyno test a 'typical' mk4 and measure the changes. They used a relatively stock 2002 GTI 337 edition. The car was chipped, had a cold air intake, and an aftermarket diverter valve. No other engine modifications were made to the car. Equipped with stock exhaust, they drove the car thoroughly and dyno tested it. The stock exhaust was swapped out for 42's 3" turbo-back system and the car was driven to adapt then dyno tested again. With weather conditions literally exact we measured peak gains of 22.5 hp and 48 lb/ft to the wheels! Power gains were felt all over. Boost was built faster and held out longer with the stock turbocharger. No power losses were felt at any point in the powerband. To view a full size, un-altered dyno sheet click here: mk4 1.8T dyno chart
42's 3" turbo-back systems are available in 3 tip configurations, each with unique fitment on Jetta and GTI models. The single tip GTI system includes a 4" tip designed to fit the 337/20th valance. The single tip Jetta system also includes a 4" tip. This system is designed to fit the GLI single tip valance only. The dual tip GTI and Jetta systems include a pair of 3" tips spaced to fit perfectly within the stock valance. These systems fit all models from 2001+ with the factory dual-tip valance. We also offer a hidden tip model for both GTI and Jetta models. On both systems the hidden tip dumps exhaust gases right before the start of the valance. Height and angle of the cut is designed to reduce drone and not melt the valance. The hidden tip is exposed only 1/2" below the bottom of the valance. Truely hidden.
Construction
CNC mandrel bent 14 gauge aluminized steel tubing
CNC machined 3/8" steel flanges
100% TIG welded construction
Stainless steel braided flex section
Magnaflow resonator, muffler, & high flow catalytic converter (street series)
Modular construction allows for simple changes between street series (w/cat) and race series (w/out cat)
Other Details
Available in street series (w/cat) or race series (w/out cat)
4 triple layer gaskets & OEM K03 gasket included
5/16" corrosion resistant hardware included
Processing Time
All 42 Draft Designs exhaust systems are built right here in the USA. Please allow 3-5 business days for your system to be built prior to shipping out.
