VW Polo mk2 86C 1.3 GT MAF sensor delete, do you have a Polo GT and are having issues with you standard ECU and have decided to use a standalone ECU instead. 
Well the is a bolt on replacement for the maf sensor and removes the restriction. 
The delete goes from the standard 44mm square in the airbox to the standard 60mm round hose, totally replacing the maf sensor. 
We also offer a second option of this , which has a mounting location for a 1.8T air temperature sensor. 
Third Option: Add an Air Velocity Stack. 
NOTE: due to the age for these cars/engines, the airbox area around the flange may have warped, so you may need to seal the flange face with sealant.