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Stage 8 8935 Locking Header Bolt Kit 5/16-18 x 1 Inch 12-Point

(Audi S4 2004-08, A4 Quattro 1997-2001, A4 1997-2000, 2005-10, A8 Quattro 1997-2000, 2004-10, Coupe 1981-87, Fox 1978-79 + 128 more models)

Part of: Stage 8 Locking Header Bolt Kit

Other options in this family: Stage 8 8911 Stage 8 8910A Stage 8 8913 Stage 8 8912A Stage 8 8914

Manufacturer

Picture for manufacturer Stage 8

Part Number

8935
14 reviews
Sale Price

$72.07

4 left at this price

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Usually delivered within 2 days

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Product Details

The Stage 8 8935 Locking Header Bolt Kit provides secure, vibration-resistant fastening for exhaust headers and high-temperature applications. This 12-piece kit includes 5/16-18 x 1 inch bolts with 12-point heads, designed to prevent the loosening that can lead to exhaust leaks, gasket failure, and horsepower loss.

Key Features:

  • Patented three-piece locking system with bolt, retainer, and spring clip
  • Constructed from 4130 alloy steel for strength and heat resistance
  • 12-point head design for easier installation in tight spaces
  • 5/16-18 thread size with 1 inch length
  • Complete kit with 12 bolts and all necessary locking hardware
  • Prevents bolt loosening from vibration and thermal cycling
  • Reusable design for multiple installations

Stage 8 Locking Fasteners use a unique mechanical locking system that maintains constant tension on header bolts, ensuring a secure seal between the header flange and cylinder head. The spring clip and retainer design allows for thermal expansion and contraction while preventing fastener backup, making these bolts ideal for high-performance and racing applications where reliability is critical.

Products specifications

Fits

Audi S4 2004-08, A4 Quattro 1997-2001, A4 1997-2000, 2005-10, A8 Quattro 1997-2000, 2004-10, Coupe 1981-87, Fox 1978-79; Dodge Durango 1998-2003, Ram 2500 1994-2002, Ram 1500 1994-2003, Dakota 1989-2003, Challenger 1970-74 + 123 more models

Fastener Finish

Nickel plated

Fastener Material

Steel

Fastener Style

Bolt

Head Style

12-point

Quantity

Sold as a set of 12.

Thread Size

5/16 in.

Underhead Length (in)

1.000 in.

product was as shown

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prompt delivery

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Very speedy and in excellent shape. Easy to install and only took minutes. Autoplicity in my book is a great place to shop. <br><br>-Jason Chance<br> Cape Fair, MO

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