42DD MK4 1.8T 3 Downpipe : USRT Real cars, Real Roads, Real Fast!
![](https://usrallyteam.com/images/exhaust_mk4_downpipek03.jpg)
USRT 42DD MK4 1.8T 3 Downpipe - Bolt-on more horsepower, torque and boost response! Replacing the factory downpipe and catalytic converter is an important step when upgrading
2003 1.8T GLS fast and furious jetta being saved
![](https://usrallyteam.com/images/exhaust_mk425slip_catback_02.jpg)
42DD MK4 Cat-Back Exhaust Systems : USRT
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Your MKIV mods and specs(member database)
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