NHRA CobraJet 20% OD

We stock these with Doubel 3/16" keyways -

We can Use Step keys to create a double 1/4"   or a 1/4" + a 3/16"  if needed.  

If you want to pin it instead of using the keyways- just fill the keyways with silicone . 

2V, 3V, 4V Race Damper (no rib drive)