Under Supercharger Kit (Audi 3.0T Gen 1 B8)
Under Supercharger Kit (Audi 3.0T Gen 1 B8)
Regular price
$724.99
Sale price
$724.99
Regular price
$775.99
Unit price
per
Shipping calculated at checkout.
Couldn't load pickup availability
- Fully secure checkout
- Trusted by thousands
- Rated and reviewed
Documentation
Question about this product?
We're happy to help.
Up to 7% off
Overview
Everything you need for supercharger-off service on your Audi B8 S4, S5, A6, or Q7. This comprehensive kit includes a GPS billet aluminum thermostat assembly, aluminum heater pipe, Graf metal water pump, OEM PCV valve, and all critical gaskets and seals that should be replaced when accessing the valley of your 3.0T TFSI engine.
When removing your supercharger for carbon cleaning, thermostat replacement, coolant leak repair, or performance upgrades, these are the parts you should replace while you have access. The B8 platform commonly develops coolant leaks from the thermostat housing and heater pipe, while intake manifold gaskets and PCV components deteriorate over time. This kit bundles everything in one package, preventing the need for a second teardown.
Specifications
| Application | Audi 3.0T Gen 1 B8 Platform — S4, S5, A6, Q7 |
| Compatible Engine Codes | CAKA, CCBA, CGWA, CGXA, CMUA, CAJA |
| Thermostat Assembly | GPS Billet Aluminum — Replaces OEM 06E121111AL |
| Heater Pipe | Aluminum Upgrade — Replaces OEM 06E121065N |
| Water Pump | Graf Metal — Replaces OEM 06E121018A |
| PCV Valve | OEM Hengst — 06E103547AC |
| Upper Intake Manifold Gaskets | Elring x6 — 079129717D |
| Lower Intake Manifold Gaskets | Elring x6 — 079129717B |
| PCV to Supercharger Adapter Pipe | Genuine VW/Audi — 06E103213 |
| Fuel Injector Seal Kit | Elring Klinger x6 — 06E998907E |
| Optional Add-On | OEM Audi Crossover Pipe — 06E121045BD |
Features & Benefits
✓
Billet Aluminum Upgrades Where OEM Uses PlasticThe GPS billet aluminum thermostat assembly and aluminum heater pipe eliminate known OEM plastic failure points common on the B8 3.0T.
✓
Complete Single-Teardown SolutionEvery gasket, seal, and wear item that should be addressed during supercharger removal is included — no second teardown required for parts you should have replaced the first time.
✓
Premium OEM and OEM-Equivalent Parts OnlySourced from trusted suppliers including Graf, Elring, Elring Klinger, Hengst, and Genuine VW/Audi — no economy-grade components.
✓
Addresses All Common B8 Valley Failure PointsTargets the thermostat housing coolant leaks, heater pipe failures, PCV system degradation, and intake manifold gasket wear that are endemic to the Gen 1 3.0T TFSI platform.
✓
Ideal for Carbon Cleaning, Ported Blower Swaps & Preventive MaintenanceWhether you are performing intake valve carbon cleaning, installing a ported supercharger, or doing a full cooling system refresh, this kit covers all concurrent service items in one order.
✓
Optional Crossover Pipe Add-On AvailableThe OEM Audi Crossover Pipe (06E121045BD) is available as an add-on to complete a full cooling system refresh while the supercharger is off.
Frequently Asked Questions
Which Audi B8 models and engine codes is this kit compatible with?
This kit fits all Audi B8 platform vehicles equipped with the Gen 1 3.0T supercharged TFSI engine, including the S4, S5, A6, and Q7. Compatible engine codes are CAKA, CCBA, CGWA, CGXA, CMUA, and CAJA.
Why should I replace all these parts at the same time?
The supercharger must be removed to access the engine valley on the 3.0T TFSI. Since the labor involved is significant, replacing all gaskets, seals, and wear items in one visit prevents a costly second teardown if any of these components fail shortly after reassembly — which is common given their age and proximity to heat sources.
What are the most common reasons to remove the supercharger on a B8 3.0T?
The most common reasons are coolant leaks from the thermostat housing or heater pipe in the engine valley, intake valve carbon cleaning, PCV system failure causing oil consumption or rough idle, worn intake manifold gaskets, and performance modifications such as ported supercharger installation or pulley upgrades.
Why does the kit use aluminum components instead of OEM plastic?
The OEM thermostat housing and heater pipe use plastic construction that is prone to cracking and leaking over time due to repeated heat cycling. The GPS billet aluminum thermostat assembly and aluminum heater pipe included in this kit are direct OEM replacements that eliminate this known failure point permanently.
Is the OEM Crossover Pipe included, and do I need it?
The OEM Audi Crossover Pipe (06E121045BD) is available as an optional add-on and is not included in the base kit. If you are performing a full cooling system refresh or your crossover pipe shows signs of wear or leaking, it is recommended to replace it while the supercharger is already removed.
