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Ford Performance Stage 8 Header Bolts; 1-Inch (79-95 5.0L)

Item 50507
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Locking Header Bolts
      • Grade 8 Steel Construction
      • Duplex Nickel Plated
      • Hex Head Design
      • Size - 3/8-16 X 1"
      • Made in the USA
      • Sold as a Set of 16
      • Fits 1979-1995 5.0L V8 Mustangs


      Locking Bolts. Securely mount your Mustangs manifolds or aftermarket headers by replacing that old weak factory hardware with high strength Stage 8 Locking Header Bolts. These Ford Racing Header fasteners will absolutely, positively not back out. Eliminates need to monitor and tighten bolts regularly.

      Ford Racing Quality. Made in the USA from specially-engineered Grade 8 carbon alloy steel that features a duplex nickel plated finish to resist corrosion, these Ford Racing Header Bolts are hardened to a tensile strength of 150,000 psi to provide superior strength for long-lasting performance.

      Application. These Ford Racing Stage 8 Header Bolts are designed for use on 1979 to 1995 Ford Mustang equipped with the 5.0L small block V8 engine, including the LX 5.0, GT and SVT Cobra models.

      Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 Details

      MPN# M-9432-A51

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (11)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 11 customers

      • February 19, 2019

        5 1989 LX - SeanO

        Header hardware

        Great product everything was in the box very happy

        Helpful (2)
      • November 23, 2017

        5 1995 GT - Phinstr

        Header bolts.

        The combo of ALLEN key and standard hex work great if you have very little room to maneuver.

        Helpful (13)
      • October 21, 2017

        5 1993 LX - DavidC

        Long tubes

        Bolts are expensive but well worth it. You definitely don’t want to worry about any manifold leaks so buy these and your all set

        Helpful (13)
      • September 09, 2017

        5 1988 GT - Jolly

        Looks great

        These header bots look great however do not work well with Pypes 1-5/8 inch shorty headers due to clearance issues however looking at other reviews it is a common issue with those headers.

        Helpful (13)
      • June 06, 2017

        4 1994 GT - Bat32

        Stage 8 Header Bolts

        The bolts appear to be high quality. I like the option of using an allen wrench for installation, but you'll need an assortment of open end and box end wrenches before your through. My only criticism is the indexed washers. If the hex was off-set a bit you could flip the washer over to fit when the bolt head is not quite lined up for a perfect fit. I had to take several of them to my grinder and brush off the corner a bit to make them fit without backing off the bolt. That leaves a little more space that the bolt can back out before coming up against the header.

        Helpful (13)
      • June 12, 2016

        5 1994 GT - Tallwhiteguy


        So many times I had to replace header gaskets if I found these sooner I would have bought them ASAP. If you get headers for your mustang buy these bolts they are awesome and so easy too install.

        Helpful (14)
      • April 23, 2016

        5 1994 GT - Headhunter

        No more rusted bolts

        I just added these header bolts to my 94 Mustang GT. Look great, and I know I will be able to get them out the next time I need to.

        Helpful (13)
      • June 14, 2014

        5 1992 GT - CarCigarGuitar

        Save time and frustration...GET THESE BOLTS!

        So after installing new BBK Shorty Headers, I used my old crusty stock bolts to finish up the install. Big mistake! Since the header tubes are wider than stock, it was a pain to get the 9/16" wrench in there to tighten the bolts. Not only that, but eventually they started coming loose and I kept getting an exhaust leak. After much frustration, I saw these bolts and ordered them. BIG DIFFERENCE!. Not only are the heads a 7/16" which is easier to get a wrench in, you can get a socket on the bolt...and the head itself has a hex for an allen wrench. As if that wasn't awesome enough (cut my install time from 1 hour to 15 minutes, the locking clips keep them from backing out. AND....they look sexy as heck on my new headers versus the rusted bolts. Do yourself a favor...don't skimp like I first did and reuse the stock bolts...get these and you won't be sorry!!!!

        Helpful (13)
      • May 27, 2014

        5 1990 GT - bitta

        stage 8 header bolts

        these bolts are working great. if you have header bolts backing out all the time, try these bolts out and it should fix the problem.

        Helpful (13)
      • January 20, 2014

        5 1992 Other - 347Tony

        An awesome product to keep pesky header bolts tight

        This product was an awesome addition to my Fox. Every time I happened to check the header bolts they were looses. So finally a bad header leak developed and I found one bolt had actually backed all the way out. So I picked up a set of header gaskets and these locking header bolts. The bolts are great, but if you are running BBK Equal length, you will not be able to use the 1" bolts on the forward hole of the #3 cylinder, the primary is at too tight of a radius to use the 1". So I still have the 3/4" fastener there.

        Helpful (15)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Will these fit a 2012 mustang gt with a coyote 5.0? Or what part number would that be , thanks !

      • These will not fit 2012 models. At this time we do not offer header bolts for your vehicle.

      Helpful (0)

      Will these dirt a 2012 mustang gt with a coyote 5.0? Or what part number would that be , thanks !

      • These will not fit 2012 models. At this time we do not offer header bolts for your vehicle.

      Helpful (0)

      why are the bolts 1" long ?? are 3/4 better or these for bbk equal length. ???

      • The Ford Performance Stage 8 Header Bolts are 1" in size to be the optimal size for any application.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (16) Bolts
      • (16) Washers

      Tech Specs

      • Thread Size: 3/8-16 in
      • Head Style: Hex
      • Length: 1 in
      • Fastener Material: Grade 8 aircraft steel
      • Fastener Finish: Duplex nickel plated

      Will It Fit My Mustang

      • Cobra - 93, 94, 95
      • Cobra R - 93, 95
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Other - 79, 80, 81, 82, 83, 84, 85, 86

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