If you're looking to push your ride to the next level, the APR High Pressure Fuel Pump (HPFP) is where it’s at. This isn’t just any pump; it’s designed to crank out a serious volume of fuel, which is exactly what you need if you’re running a high horsepower setup like APR's Stage 3+ EFR7163R Turbocharger System on your MK7 Golf R or S3. Trust me, when it comes to performance, this pump delivers.

Now, a bit of background: APR has been in the game since 2006, and they’ve built a solid reputation as an OEM supplier for VAG. With thousands of these pumps out there, they’ve got the experience to back up their claims. The technology they’ve developed is rock solid, and it shows in the reliability of their fueling components.

So, what’s the deal with direct injection? Back in the early 2000s, VAG introduced this FSI technology that changed the game. Instead of the old-school method where fuel was injected at lower pressures, direct injection sprays fuel directly into the cylinders at over 2,900 psi (that’s about 200 bar for those keeping score). This means more power, less fuel consumption, and lower emissions. It’s a win-win, and you'll find this tech in the 2.0T EA888 Gen 3 engine.

Here’s how it works: the fueling system operates at those crazy high pressures thanks to a cam-driven HPFP that gets its juice from a low-pressure pump. The setup is pretty clever—there’s a four-point cam lobe on the exhaust camshaft that drives the Hitachi Generation III HPFP. As your engine revs up, this pump really starts to shine, displacing more fuel with every turn. But here’s the kicker: upgrading to the APR HPFP isn’t just about boosting pressure; it’s all about increasing the volume of fuel available. This is crucial when you're pushing the limits of your engine.

The APR HPFP is a game changer for those times when your fuel rail pressure just can’t keep up. It ups the ante by increasing the bore diameter of the pump’s internal pressurizing cylinder, allowing for a higher volume of fuel to flow at any RPM. This means it can handle the demands of high horsepower applications without breaking a sweat. Just keep in mind, you only need this upgrade if APR suggests it for your setup.

As for fitment, this pump is compatible with a range of vehicles, including:

• Audi 80 (1988)
• Audi A3 (2017-2019)
• Audi A3 Quattro (2015-2020)
• Audi A4 (2019)
• Audi A4 Allroad (2020)
• Audi A4 Quattro (2020)
• Audi A5 Quattro (2018-2019)
• Audi A5 Sportback (2020)
• Audi A6 (2012-2018)
• Audi A6 Quattro (2020)
• Audi Q3 (2019-2025)
• Audi Q5 (2020)
• Audi S3 (2015-2020)
• Audi TT MK3 Quattro (2016-2023)
• Porsche 95B Macan (2019-2020)
• Volkswagen Arteon (2019-2021)
• Volkswagen Atlas (2019-2023)
• Volkswagen Atlas Cross Sport (2020-2023)
• Volkswagen Golf MK7 (2015-2019)
• Volkswagen Golf R (2015-2019)
• Volkswagen GTI MK7 (2015-2019)
• Volkswagen GTI MK8 (2020-2021)
• Volkswagen Jetta (2019-2025)

In short, if you’re serious about performance, the APR High Pressure Fuel Pump is a must-have. It’s built for those who want to take their driving experience to the next level. Don’t settle for less when it comes to fueling your passion.