I do not have any of the 85-87 radiator or heater cores hoses in stock at this time. Most if not all seem to be available in the aftermarket.

UPDATE 3-9-19:

A Fiero owner with a 1986 GT with A/C emailed me saying he bought aftermarket heater hoses and they do not fit. He sent me a picture and what he bought that was supposed to fit but are very different from his original hoses he took off. So I'm looking to see if others have had this problem. If so I'll have some made.

IMO one can use the 88 wit5h A/C heater hoses on the 85-87 with A/C:

I have a pair of used hoses someone sent me from a 85, 86 or 87 GT with A/C. I'm not sure what year. But IMO all 85-87's should be the same hose with A/C. The P-22 seems to be wrong IMO. It lists 85/86 as one pair only with or without A/C and 87 alone with A/C and another part numbers without A/C.

IMO the 88 hoses should work fine if you make one cut in each hose and use a double barb connector and hose clamps so you can rotate and change the length. One seems to just need to be rotated and the other rotated and shortened a few inches.

NOTE:

If there is a radiator or heater hose you need and it is not available please let me know and I'll look to have some made. I would need good samples. They can be old and junky as long as they are the same shape etc. If you could supply them or I can look for samples myself.

It seems the heater core hoses for the 87 were unique to the 87. I would have assumed the heater core hoses would be the same for all 85-87. It seems the 87 heater hoses are hard to find so I am looking to have some made. If I do it would be near the end of summer before I would have them on hand.

GM part numbers: 14101517 and 14101515