The factory K03 turbocharger is anything but impressive.
MK4 GTI UPGRADE
An intake, downpipe, and catalytic converter upgrade are necessary to make the next two improvements on our list. Something like the CTS Turbo 3” high-flow downpipe and catalytic converter will help you reach your goals. Again, you’ll notice some improvement to sound and performance after the installation, but it’s just a piece of the puzzle in terms of overall potential. Upgrading your downpipe and exhaust with a higher-flowing, better performing, and less restrictive system is going to allow you to have room to grow. The idea is to have a plan and know the steps to reach that goal. DownpipeĪgain, one single upgrade isn’t going to turn your MK4 GTI into a different car.
If you just want to make one or two upgrades, you’re better off with coilovers and wheels. If you follow everything on the rest of this list, an intake is a must. Our Luft-Technik intake system for your MK4 GTI does add some power out of the box, but the majority of an upgraded intake’s benefits happen when you pair it with other upgrades. Think of it as future-proofing your engine. However, if you have plans to make your 1.8T into a respectable power source, then you’ll need an upgraded intake. If you’re just looking to spend money, then you could arguably get more bang for your buck making your MK4 GTI perfect rather than just dumping money at a single upgrade.
It’s an age-old question and one we’ve previously answered: should I spend money on a cold air intake? The answer, in short, is yes, but there is a caveat.
MK4 GTI SOFTWARE
Everyone knows bolt-on upgrades paired with a software tune are the fastest ways to add power, but what are enthusiasts running in their cars? Where should new enthusiasts spend their money to get the most enjoyment possible out of their MK4 GTI? Today, we’re looking specifically at upgrades we think every MK4 GTI 1.8T owner should have. Thanks to its availability, affordability, and the aftermarket support offered for this engine, it’s more of a question of where to start rather than what to do. The Volkswagen MK4 GTI with the 1.8T engine is one of the most commonly modified platforms available.