as seen at https://www.thirdgen.org/techbb2/sho...7&pagenumber=2 posted by SteveSpohn.

Installation Kits:

30018: 1982-87 Camaro/Firebird 1 Cat : $99.95 - $89.95
30022: 1988-92 Camaro/Firebird 1 Cat : $69.95 - $63.95
30024: 1989-92 Camaro/Firebird 2 Cat : $59.95 - $53.95
30028: Catalyst Adapter LG4 305 82-92 $32.95 - $29.50

On installation kits and cat adapters above, first price is if 2-5 people order a kit, the second price is if 6+ people order a kit.
Installation kits are $8.95 to $11.95 depending on which kit you order. The higher priced kits are $11.95 and so on.

Now I don't know if all 6 people have to order the same kit to get the cheap price or not. i asked Steve... ANd ill ask about the other cat adapters...

Ill be the first that I know of for 30022

1. ME 30022
2.?
3.?
4.?
5.?
6.?

 

You can get these same prices(the lowest price) at www.thunderracing.com. The shipping is cheaper also.