Boost Pressure Conversion Valve | Mk4 1.9L TDI | ALH 99-03'This is the plastic breather valve located directly on the top of the engine valve cover. Fits: Mk4 TDI, engine code ALH Hella of Germany develops and manufactures original equipment lighting components and electronic products for the automotive industry.

providing a sleek and clean solution to plumb your blow-off/diverter valve

If you are looking for a more subtle and daily-drivable upgrade

NEUSPEED Rear Sway Bar Performance Links provide direct transition of suspension movement to the anti-roll bar

Battery voltage (red wire / black wire - read through power and ground wires)

9 Trailing Arm Bolts

P3 ESVA (Ethanol Sensor Voltage Adaptor) allows your gauge to read ethanol content and fuel temperature directly from the common Continental/GM flex fuel sensor

use the standard torque values below and apply medium-strength blue threadlocker to clean threads for added safety if you want

10 Audi A4 w/S-line & S4 B8)

With its unique Mesh design

Manifold plug can double as boost tap

In addition the OEM cold air intake tube remains fully functional

Engineers have spent countless hours fine-tuning the sound too