DeatschWerks 01-09 Audi S4/RS6/S6 4.2L V8 550cc Injectors - Set of 8

When you're looking to upgrade the fuel system on your Audi S4, S6, S8, or RS6 with the 4.2L V8 engine, this set of eight 550cc fuel injectors from DeatschWerks is a solid choice. These injectors are designed to deliver more fuel than stock, which is often necessary when you've made other performance modifications to your engine. You get a matched set of eight injectors, ensuring that each cylinder receives the same amount of fuel for consistent performance across the board.

DeatschWerks has been in the business of making high-performance fuel system parts since 2004, and they build these injectors in their Oklahoma City facility. They are known for offering drop-in fitment injectors, meaning these should install without major modifications to your fuel rails or intake manifold. The 550cc flow rate is a popular upgrade for many performance applications, offering a good balance between increased fuel capacity and drivability for daily use. This set is specifically calibrated for the 4.2L V8 found in various Audi models from 2001 through 2009.

It's important to note that these injectors are not CARB approved and cannot be shipped to California. If you're planning a significant engine build or tune, these injectors will be a key component in supporting your power goals. Make sure your tuner is aware of the injector size you're installing so they can properly calibrate the engine management system.