1979-1995 Mustang Proform Self Locking Wedge 1" Header Bolts by Proform Parts

1979-1995 Mustang Proform Self Locking Wedge 1" Header Bolts

With this wedge-lock designed header bolt, your 1979-1995 Mustang headers will stay tight and free from annoying exhaust leaks!

Item #PFM-66756
MPN# 66756

Everyday Low Price: $39.99

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  • No Need For Re-Tightening
  • Resists Vibrating Loose
  • Reusable


  • Black-Finish
  • Wedge-Lock Design
  • 1" Length

 What's in the Box

  • (16) Header Bolts

1979-1995 Mustang Proform Self Locking Wedge 1" Header Bolts

Header bolts consistently tend to loosen over time due to the amount of vibration on your stock manifold or aftermarket headers. With the Proform wedge locking design, loose header bolts are a thing of the past! Each one of these 1", Proform Wedge-lock self-locking header bolts are permanently assembled with a set of special wedge locking washers! Once each header bolt has been torqued sufficiently, the washers engage the bolt and header flange. During vibration, the bolt will try to loosen itself, but cannot because the step-shaped teeth between the washers are taller than the bolt can stretch! With a wrench, these steps are easily overcome, resulting in easy finger loosening.


  • Fits 1979-1995 Mustang 5.0/5.8

Proform Parts Limited Warranty - Click Here

  • Ford Mustang - 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995

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About This Brand

Proform Parts
PROFORMĀ® Parts (Specialty Auto Parts U.S.A., Inc.) is a leader in the High-Performance Automotive Aftermarket by engineering and manufacturing creative products from intelligent concepts. Their goal is to provide the performance enthusiast with innovation, quality, and affordability in all our products - giving the customer maximum value. With dozens of patents, thousands of SKUs and millions of satisfied customers, PROFORM has brought innovation, quality, and affordability to enthusiasts for over 30 years. Each PROFORM part is designed to deliver maximum performance, value, and style. Shop our selection of Mustang Proform parts right here at!
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