Gear door kit

[isterfyn]

Hi thanks yes it is the gear door deletion kit my aircraft is an 0-2 1969 io-36 I fly 24 squared I get indicated 130/135 knots every one I have spoken to other than the seller informs me it increases drag reduces airspeed by 5 knots these people have fitted the kits to a number of aircraft 337 and 210
Regards stewart