Poly locks from Schumacher, as Jim Lusk said the stuff from the parts store is off shore and cheap garbage .
i have the poly locks in my challenger haven't broke them with 7000 miles of abuse from my 408.
I have solids on mine and they fit great. Don't think I will be breaking those any time soon. Also i this the brand was pioneer i got reg. mounts for my 273 and i broke one of them after 6 months
i have the poly locks in my challenger haven't broke them with 7000 miles of abuse from my 408.
