Audi Fuel Injector RS4, R8, S5 4.2L V8 (079906036D / 079906036C) 05-10

Yes. Genuine OEM replacement injectors typically arrive from the factory with the necessary upper fuel rail O-ring and the critical lower white Teflon combustion chamber seal pre-installed on the nozzle.

Removing the old injectors and pressing the new ones into the cylinder head requires care. If you are reusing any injectors, you must replace the lower Teflon seals, which requires a highly specific VAG Teflon seal sizing/compression tool. Since these new injectors come with the seals pre-installed and pre-sized, they can carefully be seated directly into the clean injector ports.

For factory 4.2L V8 replacements: No. They are plug-and-play and the ECU will automatically adapt its short-term fuel trims to the fresh flow rate. You just need to clear your old misfire codes.For 2.0T FSI upgrades: Absolutely. If you are dropping these high-flow RS4 injectors into a 2.0T 4-cylinder engine, you must have a specific big-turbo software tune (from companies like Unitronic, Eurodyne, or Revo) flashed to the ECU. Without the tune, the engine will run dangerously rich and flood the cylinders.

Yes, we ship to most countries worldwide.

You can track your order directly through our website by following these steps:

1. Go to the Europarts360 Tracking Page.
2. You will see an option to search by Tracking Number or Order ID.
3. Enter your number in the search bar.
4. Click the "Track" button to view the current status of your shipment.

We offer a 14-day return policy for all unused items in original packaging.

This warranty covers all eligible products purchased through our website for 6 months from the date of purchase.