Volkswagen help establish the blueprint for a new performance segment when the automaker introduced the original GTI nearly half a century ago. Based on the humble first-generation Golf, the GTI paired the compact’s lightweight construction with a performance-tuned suspension, more power, a close-ratio manual gearbox, eye-catching styling, and an accessible price tag, all of which would become hallmarks of the burgeoning hot hatch segment in the decades to come. And although automotive design has advanced in countless ways since the first GTI rolled into a dealer showroom back in 1976, the formula remains largely the same today with the eight-generation (Mk8) Volkswagen GTI.

“You have the practical benefits of a hatchback, yet it’s a pretty specialized car that really speaks to young performance enthusiasts,” says Arin Ahnell of APR. “These cars are really fun and engaging to drive, yet they’re also totally usable on a day-to-day basis. The appeal is founded on an emotional connection, but there’s a pragmatic element to it as well.”

Built on Volkswagen Group’s modular MQB Evo platform and motivated by the fourth-generation turbocharged 2.0-liter EA888 four-cylinder engine, the Mk8 GTI’s inherent strengths continue to make it favorite among enthusiasts, but there’s also a lot more performance to be had with just a few calculated tweaks.

“The car comes with a turbocharged engine, and Volkswagen left a ton of headroom there, so there’s a big opportunity to safely add more horsepower,” Ahnell explains. “There are also just a lot of small compromises in the factory design which were made for the sake of wide audience appeal. For example, the car is rated to use 87 octane fuel, but as we all know, you can make a lot more power if you can leverage the advantages that higher octane fuels offer. The suspension is also tuned to favor comfort over responsiveness and it sits pretty high up in the air, and the exhaust has to meet federal regulations, so it’s pretty quiet. Right away there are a few things we can do which will really enhance the whole experience.”

We sat down with Ahnell to get the scoop on the best bang-for-the-buck upgrades for the latest GTI – mods that will tangibly elevate the capability and fun-factor of the Mk8 while maintaining its finely-honed performance balance.

The APR Ultralink and Stage 1 Tune

Tuning – “If I were starting the modification journey with a stock Mk8 GTI, the first thing I would get is the APR Ultralink and download our ECU upgrade,” he says. “The Ultralink is our tool which allows you to install our calibrations. It’s incredibly easy to use – you just plug it in, and it shows you the tunes that are available for the vehicle. You can purchase the tune right there and install it at home by connecting the device to the vehicle’s OBD II port.”

Ahnell tells us that even with a stock or near-stock Mk8 Volkswagen GTI, this Stage 1 tune will deliver massive power gains.

“With 93 octane fuel, you can take the car from the factory-rated 241 horsepower and 273 lb-ft to 345 horsepower and 404 pound-feet of torque with just this tune. And it goes even higher if you run ethanol fuel. There’s just so much headroom with this turbocharger from the factory, and the factory limits performance substantially due to the fact that they’re tuning the engine for 87 octane fuel. Moving up to 93 octane significantly increases the amount of ignition advance you can run. So we have more boost, more ignition advance, and the higher we go up in octane, the leaner we can run the engine without it getting too hot.”

Shop APR Ultralink here.

Improving Handling with Lowering Springs

Too often enthusiasts get hyper focused under the hood and forget about handling so Ahnell recommends turning our attention to the suspension system next. “For me, the thinking is, ‘OK – now that I’ve got some power, let’s improve the handling and give the car a more performance-minded look.’”

Check out APR Roll-Control Lowering Springs here.

These springs will drop the front end of the car by nearly an inch, while the rear will come down by more than an inch as compared to the factory setup. This drop not only levels out the stance of the car, it also improves the vehicle’s center of gravity, while the stiffer spring rates will translate to better body control during spirited canyon drives, out on the autocross course, and during on-track lapping sessions.

Check out APR Lowering Bump Stops here.

“The bump stops are optional, but I’d recommend them,” he says. “These are designed to ensure that you’re not sacrificing comfortable ride quality when swapping over to our lowering springs. If you lower the car without the APR bump stops, the car ends up basically sitting on the factory bump stops, which just isn’t ideal in terms of both comfort and functionality.”

He also notes that owners will still be able to get the car’s alignment into factory specifications with these springs. And for those with Mk8 GTIs that came from the factory with adaptive dampers (known as Dynamic Chassis Control in Volkswagen parlance), the use of lowering springs – rather than a full coilover setup – allows you to retain those electronically-controlled dampers, too.

Cold Air Intake

While APR’s intake system will deliver gains of 11 horsepower and 11 pound-feet of torque at the wheels with an APR Stage 1 tune and no other changes, Ahnell says the biggest benefit of this upgrade isn’t as easily quantified.

“It flows much better than the factory intake does, so there’s definitely some performance benefit to be had. But to me, it’s really about the improved sound that you’re going to get from it. You, the driver, are going to hear the engine more, and that really makes the experience feel more visceral. This is also one of those upgrades that brings additional performance improvements to any other engine-related upgrades that you do. You’re also putting less strain on the factory components with this intake because there’s lower pressure drop across the turbocharger. That means the turbo doesn’t have to work as hard to hit the same airflow levels.”

Intercooler

Keeping our attention on the turbo system, Ahnell says that an intercooler upgrade can take the EA888’s horsepower levels even further without any other mechanical changes.

“If it were me, I’d be going after more power again, and this intercooler will dramatically lower the temperature of the air that comes into the engine. And because of that, we can safely get even more horsepower out of this engine. When you combine the cold air intake and the intercooler with our ECU upgrade, it puts you at our Stage 2 power levels. At that point the mapping knows that the air flow is higher and the temperatures are lower, so the power increases in turn. On 93 octane, this combination will deliver 358 horsepower, and with ethanol, that horsepower figure goes all the way up to 392 hp.”

APR also offers covers for this intake, which allows you to choose between an open or closed intake design. This in turn allows you to fine-tune the sound of the intake and bring more personalization into your GTI’s engine bay.

Lightweight Wheels and Exhaust Upgrades

Wheels

These play a big role in the overall look of a vehicle, but in the case of APR’s A01 (silver) and A02 (bronze) wheels, the benefits run deeper than just aesthetics.

“This is definitely something that should be on your radar if it’s time to replace your tires anyway,” Ahnell points out. “Our wheels are flow formed, which makes them both stronger and lighter than a traditional cast wheel. Our 18 x 8.5-inch wheels weigh in at 18.5 pounds, and that’s a significant improvement in rotating mass as compared to the factory wheel. And aside from the great looking designs and color choices, these wheels are also wider than the factory wheels, which means you can run a wider tire. That extra width equates to more mechanical grip, which will improve handling, braking, and off-the-line acceleration.”

Exhaust

For those who want a soundtrack that goes above and beyond the aural drama provided by the intake upgrade, he recommends checking out APR’s cat-back exhaust system for Mk8 GTI. Featuring T304 stainless steel construction, mandrel bent tubes, and TIG welding throughout, this low-profile design boasts larger diameter tubing than the factory exhaust as well as a drone-eliminating Helmholtz resonator. It’s also nearly 10% lighter than the stock hardware, and the 4-inch exhaust tips feature a removable design that allows you to choose between a polished or brushed look whenever the mood strikes you.

Shop ARP Mk8 GTI exhaust systems here.

Although the term “performance” means things to different people, Ahnell adds that these upgrades will benefit just about any type of Mk8 GTI project, whether the goal is muscle car-shaming straight-line speed, Porsche-baiting cornering prowess, or simply putting together a fun car that stands out in a crowd.

“Just be sure to start with the Ultralink – that’s going to be kind of the ‘gateway drug.’ And then buckle up, because you’re probably not going to want to stop there.”