This is a set of charge port adapters that convert your original R12 ports, to R134a ports. This set is for GM vehicles which used a unique high side R12 port, which is smaller in diameter (3/16") than the low side port (1/4").
NOTE - These adapters REQUIRE the removal of the original Schrader valve core before installation.
**PLEASE CHECK THE SIZE OF YOUR PORTS BEFORE ORDERING. IF YOUR PORTS ARE THE SAME SIZE, THIS KIT WILL NOT WORK. PLEASE SEE PART # 14-122**