Track Dog Racing Supercharger Belt Tensioner. Fits 1990-2005 Miata with M45 or MP62 Superchargers. Used- no issues with any of the idlers. New powdercoating.
Part number: TDR-TEN4-BKT
Link to new product: https://trackdogracing.com/tdrbelttensioner.aspx
From TDR Website:
If you have the original belt tensioner from the JRSC or Moss kit, take a look at the TDR Belt Tensioner Bracket. This innovative product makes tightening the supercharger belt a snap. And TDR has taken the Belt Tensioner Bracket one step further by adding new steel flanged idler pulleys designed to keep the belt inline. These pulleys are virtually indestructible and will not get damaged from belt wear.
Thinking of upgrading your old JR M45 or MP62 4-rib supercharger belt tensioner? A new drive belt stretches and requires 2-3 adjustments before reaching near the longest stretch. The older style JR tensioner bracket requires several bolts to loosen in order to make a simple tensioning adjustment. The new Moss tensioner is a nice improvement over the old style, but falls short in tensioning travel (maximum of 1″) and is not as solidly mounted as the TDR Tensioner with its two-piece design.