#37-16B Speedo/Tachometer Cable grommet 3 Speed & AUTO (1 hole) 65-67 #37-16C Speedo/Tachometer Grommet 3 SPD,4 Speed, Auto (1 Hole) 63-64 #35-32A Grommet for A/C Line through Radiator Support) (1 hole) 63-65 #35-32B Grommet for A/C Line through Radiator Support) (1 hole) 66-67, need 2 per car

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These are correct reproduction Grommets - rubber with metal insert, rubber is soft and flexible enough to slide over cables and A/C metal fitting.

    #55-52  Installation Tool for speedo/tachometer cable grommet   
use for easier installation of grommet #37-16b & 37=16c over cable end nut   

#37-16A 

#37-16A Speedometer/Tachometer cable grommet 4 Speed (2 HOLE) 64,64,65,66,67 Corvette
#37-16b & c   speedometer or Tachometer Grommet  1 hole 

  #37-17A & #29-11  

#37-17A Oil line grommet on firewall  (NON A/C- 2 HOLE) 63-67 Corvette

#37-17B Oil line grommet on firewall (A/C- 4 HOLE) 63-67 Corvette

#29-11 Antenna Cable Grommet (2 HOLE) 63-67 Corvette