Upgraded 1.8T SAI Delete Block Off Plate Kit Fits For VW Audi Mk4 1.8T Engine
1.8T Engine SAI Delete Block Off Plate Exhaust Accessory for VW for Audi Mk4. Fits for Mk4 TT B5 B6. This SAI (secondary air injection) block off plate is on the 1.8T cylinder head when the system has been removed.