APR 4 Bar Fuel Pressure Regulator for 2000–2006 Audi TT (1.8T). Direct-fit OEM Bosch regulator that sets rail pressure to 4 bar for builds needing added fueling headroom.

Designed for tuned 1.8T applications, this unit raises baseline fuel pressure over the stock 3 bar part, enabling correct injector characterization when your calibration specifies 4 bar. It installs on the factory TT and TT Quattro rail, reusing OEM clips and lines. Ideal alongside larger injectors or turbo hardware where a 4 bar reference is required for consistent delivery and drivability.

Features

• 4 bar nominal fuel pressure for 1.8T rails
• Direct replacement for 2000–2006 Audi TT/TT Quattro
• OEM Bosch construction; plug-and-play with the right tune
• Supports increased injector flow with proper calibration

Questions about fitment or tuning? Call us. We offer installation and customization at our Austin, Texas and Los Angeles, California area shops: 512-982-9393 (TX), 562-981-6800 (CA).

If you are considering multiple items, contact us for shipping discounts. We install on premises at both locations.

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