Silikon hose EFR to TFSI (pressure hose) Boost hose made of silicon for TFSI-EFR Upgrade Turbo kit Special for our EFR-6258 / EFR-6758 / EFR-7163 TFSI Upgradeturbo kit This silicon hose connects the boost outlet of our TFSI EFR Upgrade Turbocharger with the original boost pipe what is mounted at the engine block and goes to the intercooler in the front. It is made with 4 mesh layers and 5mm wall thickness like all our silicon hoses. In hidden black with TurboZentrum icon as quality marking. Inner diameter: 51 mm