This 13B stud kit is used with Factory Mazda cast iron (Cosmo/FD) plates.
kit uses 7 longer studs (16 studs in total) with double ARP 12 point nuts
 
*Kit Includes:
9 x Ground 1/2 UNF Studs
7 x Ground 1/2UNF Long studs 
23 x 12 point 12/UNF Nuts
23 x chamfer washers 
23 x O rings
 
Note: If listed as out of stock. Contact us directly sales@billetrotary.com.au