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Header Welding Purge Plate: Big Block Chevy Wedge Heads

BBC, Purge Plate

Revolutionary Purge Plates from Stainless Headers Mfg., Inc. The Big Block Chevy Purge Plate works with all Conventional (4.84") Bore Space engines, as well as 5.0" and 5.3" wedge style heads, such as from Brodix, Dart, CFE, Sonny's, and more.
Limited Supply
Availability: PreOrder Only- Expected Lead time of 6-8 Weeks
Was: $799.95
Sale: $675.00
Save: 16%
Save: $124.95

Customize Your Item

- Gasket Type -
 * required
- 3/8"-16 Helicoil Repair Kit? -
 * required
- Add (4) Barbed NPT Fittings? -
 * required
- Add Hard-Shell Storage/Carrying -
 * required
Free GROUND Shipping


Header Welding Purge Plate: Big Block Chevy Wedge Heads

A revolutionary tool from Stainless Headers Mfg., Inc. These purge plates combine the best solutions for your header welding needs, without compromising anywhere. They are CNC machined from 1” thick billet aluminum, and finished in a hard anodized coating. Each purge plate is themed for a particular combination of cylinder heads to maximize a builder’s efficiency. Our Big Block Chevy Wedge Plate for example, combines a conventional 4.84” bore space engine, with the bolt patterns for 5.0” AND 5.3” bore space Big Block Applications. Each pattern features every bolt, drilled & tapped for standard 3/8” header bolts, allowing the builder to maximize clamping force against the purge plate. Each port also includes a top-mounted ¼” NPT port for various purge fittings. Each plate comes with argon diffuses already installed in these port centers, to maximize argon coverage for flange welds and efficiently purging your header system- creating stronger welds, reduced contamination, and lower argon usage. The front face of each port has a purge line and quick-connect fitting built in, ready for a quick-connect argon line to efficiently swap your purge line between cylinders, continuing to save on argon costs, while improving weld quality. Every Purge Plate comes engraved with bolt pattern identification, and a short description of applicable cylinder heads the bolt pattern connects with. These Purge Plates are the perfect Welder’s Helper when it comes to effective heat sink, argon usage, bolt pattern verification, and maintenance free upgrades to your welding arsenal. The combination of bolt patterns drastically reduces costs by saving on quantity of tools required for any weld shop, and maintaining complete clamping force. With over 100 variants, there is a plate to cover all of your header welding needs.


  • (3) Unique Bolt Patterns- 4.84", 5.0", and 5.3" Bore Space BBC Wedge Heads.
  • (4) Independent Purge Inlet Fittings.
  • (4) Independent Purge/Argon Diffusers
  • 1" Thick Billet Aluminum heat sink
  • Hard-Coat Anodized Finish for Durability
  • Laser-Engraved Bolt Pattern Identification & Description

Kit Contents:

  • (1) Big Block Chevy Wedge Head Purge Plate
  • (4) 1/4" NPT Air-Style Male Quick-Connect Fittings
  • (4) 1/4" NPT Argon Diffusers
  • (1) Roll of PTFE Thread Tape
  • (1) ARP #400-1109 Stainless Header Bolt Kit (6pt, 1" Long, Stainless Header Bolts (x16)

Optional Add-On's:

  • (1) Pair of Matching Header Gaskets (Select your application)
  • (4) 3/8" Helicoil Kit for thread repairs
  • (4) 1/4" NPT Barbed Hose Fittings (add-on, kit will ALSO come with standard quick-release style fittings)
  • Hard-Shell Storage/Carrying Case


Patent Pending




Shipping Information

  • Item Requires Shipping
  • 25.0 lbs.
  • W25.0000” x H13.0000” x L5.0000”
  • Free GROUND Shipping
  • This item ships in its own box.

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