PROFORM Nickel Plated Grade 8 Wedge Locking M8 X 1.181” Header Bolt Set Mustang 4.6L/ 5.4L 1996-2010

This set of 16 PROFORM Nickel Plated Grade 8 Wedge Locking Header Bolts are direct-fit replacements for 4.6L and 5.4L Mustangs. Each bolt is made from grade 8 steel and is made to the original M8 X 1.181” thread pitch and measurements. Each bolt features a hex head design, making them compatible with common ratcheting bits. When properly torqued to 28+ ft-lbs, the washer’s super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header.

Features and Benefits:
- Grade 8 (12.9) Steel
- Hex Head Type
- Self-Locking Design
- 1.181-inch Length
- Fits Select Ford 16 Bolt 8mm Diameter Applications
- PROFORM Parts Brand Product
- Sold as a Set of 16

This keeps them from backing out or loosening while driving. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. The set is sold as a set of 16, so you can get the job done in one go.

Vehicle Fitment:
- 1996-2010 Mustang
- 4.6L and 5.4L Engines