It meets or exceeds the performance of OEM replacements (based on in-house testing). IMPORTANT NOTE: This replacement kit is an aftermarket product produced by CalPalmy (TM).
This kit is a set consisting of 8 rollers and 8 studs/axles – the necessary number for a complete replacement!
And the complete kit is well-tested by the manufacturer for safety and longer use, not OEM parts but quality equal to OEM requirements even better