How to Build a Manifold
Step 1

Cut your head plate by CNC or Water Jet cutting from stock aluminum material.

Head Plate Example
A new head gasket can be a great source to acquire measurements needed for the custom head plate.  Extrudabody plans to carry some of the most popular head plates in the future.  Please contact us for assistance or a recommendation for a source to fabricate a head plate.
Step 2

Mock up and cut the runners to achieve 90mm bore spacing for the Extrudabody Weld Plate


Step 3
TIG weld runners to the Extrudabody Weld Plate and your Head Plate

Manifold Welding Example

ITBs on Weld Plate:

ITBs on weld plate

Notes:

  • Most modern engines have fairly evenly spaced ports while older engines usually require more space between cylinders 2 and 3.  Blank Weld Plates are available so you can reduce the runner angles if needed to improve flow characteristics
  • Clean-up work on the ports after welding can be expected
  • Securing plates to a weld table helps hold shape when welded
  • Runners can be cut lengthwise in a pie shape and rewelded to create tapered runners.