My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Proform Parts 66823 Wedge-Locking Header Bolts

(Chevrolet Silverado 1500 1999-2000, 2009, Suburban 1500 1996-2000, Camaro 1975-78, 1982-2000, Corvette 1975, 1977-78, 1982, 1984-94, 1996-2000 + 72 more models)

Part of: Proform Parts Wedge-Locking Header Bolts

Other options in this family: Proform Parts 66752 Proform Parts 66751 Proform Parts 66824 Proform Parts 66753 Proform Parts 66755

Manufacturer

Picture for manufacturer Proform Parts

Part Number

66823
8 reviews
Sale Price

$39.95

3 left at this price

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Proform Parts 66823 Wedge-Locking Header Bolts provide a secure, vibration-resistant fastening solution for exhaust headers. These specialized bolts feature a wedge-locking design that maintains consistent clamping force even under extreme heat cycling and vibration conditions common in performance exhaust systems.

Key Features:

  • Wedge-locking design prevents loosening from heat and vibration
  • Engineered for high-temperature exhaust applications
  • Direct replacement for OEM header bolts
  • Professional-grade fasteners for reliable exhaust sealing

Application Fitment:

  • GM Big Block: 396, 402, 427, 454, 502 (excludes 348 and 409 engines)
  • Ford Small Block: 289, 302, 351W, and 5.0L engines
  • Mopar Big Block: 413 engines

These header bolts are ideal for performance builds, engine swaps, and header installations where secure fastening is critical. The wedge-locking feature eliminates the need for lock washers or thread-locking compounds while ensuring your headers stay properly sealed.

Products specifications

Fits

Chevrolet Silverado 1500 1999-2000, 2009, Suburban 1500 1996-2000, Camaro 1975-78, 1982-2000, Corvette 1975, 1977-78, 1982, 1984-94, 1996-2000, Tahoe 1996-2000, S10 1988-94, 1996-2000, Impala 1974-75, 1977-78, 1982-85, 1994, 1996 + 69 more models

Color

Black Oxide

Part Type

Header Bolts

Material

Steel

Finish

Black Oxide

Length

3/4 Inch

Very easy website to navigate and order from. Payment process was quick and easy as well. Delivery schedule was as promised and arrived as scheduled.

Exact replacement. Quick and easy website. Thanks

I received the part number from bayliner to order but it is 2 feet too long , how do I exchange it

They had what I was looking for!

Everything went well.

Fast delivery

Just great

Fast and Easy

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy