Heavy Duty Head Stud Kit by ARP MX-5 Miata 1990-2005

  
ARP studs are thread-rolled after heat-treat, which gives them ten times the fatigue strength than studs that are threaded prior to heat-treat (a very common industry practice). It is more expensive to do it this way, because it's tough on tooling, but the results are well worth the extra effort. You won't find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality.

Mazda MX-5 Miata 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005. To return a part, follow the instructions printed on the back of the invoice. Electrical items that have been installed are not returnable.