![]() ![]() Let’s move on to a few of the popular, quality VW GTI downpipes on the market. A more aggressive exhaust note when you want it, but OEM-like sounds when you want to relax and cruise. It’s the best of both worlds, in our opinion. However, when cruising normally the catless or high-flow catted DP aren’t intrusive. The MK6 GTI will gain a louder, more aggressive exhaust note on cold starts and under heavy throttle. We think it’s a great sound even with the rest of the exhaust remaining stock. Lastly, you’ll notice slightly louder sounds with a Volkswagen MK6 catless or high-flow DP. Also, turbo spool will be a little quicker compared to the stock downpipe. Some of it depends on the cats in each downpipe. High-flow catted MK6 GTI DP’s will pick up about half of the power. The exact power gains partially depend on other mods and how aggressive the tune is. Horsepower gains with an MK6 catless downpipe come in around 10-20whp. They’ll allow the MK6 GTI to run a little extra boost which is where the bulk of the gains come from. It’s important to note – some of the power gains from upgraded downpipes aren’t from just the downpipes alone. This is especially true since MK6 DP’s with high-flow cats are typically more expensive than catless options. Otherwise, stick with a catless downpipe if emissions are not a concern. Therefore, if you want some performance gains and emissions are a concern then this is a good option. MK6 high-flow downpipes will also help reduce back-pressure as with the catless options. The bulky, restrictive OEM cat is removed in favor of a higher flowing cat. This is where high-flow catted DP’s come into play. The MK6 GTI is likely to fail emissions inspections with a catless DP. However, catless downpipes do have a major con for some. If you’re looking for a MK6 downpipe for ultimate power gains then catless is the way to go. They’re also generally cheaper since catalytic converters can be pricey. As such, MK6 catless downpipes provide better power, torque, and spool. A catless DP is less restrictive compared to high-flow catted options. Reducing back-pressure is the name of the game when it comes to an upgraded downpipe. However, an upgraded downpipe is realistic and provides the most impressive gains out of the whole exhaust system. No exhaust is actually the best exhaust on a turbo engine, like the 2.0T MK6 GTI. Therefore, reducing back-pressure in the downpipe allows the turbo to spool faster and build more boost. ![]() The pressure drop from pre to post-turbo is an important part of a turbos ability to spool and build boost. However, they’re also highly restrictive which hurts power and performance. In this guide, we compare catless and catted DP’s, discuss pros and cons of each, and list a few solid options on the market.Ĭatalytic converters (cats) in the stock MK6 downpipe help minimize emissions. Towards the top of that list should be an MK6 GTI catless or high-flow catted downpipe. Many look to tunes and bolt-on mods to take their GTI to the next level. However, Volkswagen left a lot of untapped potential in the 2.0T. The MK6 GTI 2.0T engine with its 200 horsepower and 207 torque is no slouch from the factory. Disclosure: This post may contain affiliate links, meaning when you click the links and make a purchase, we receive a commission. ![]()
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