Investment Cast Collector Flange

Ultimate Collector FlangeUltimate Headers use ultra-strong, engineered investment cast collector flanges to connect to the exhaust downpipes, with three different flange attachment options:

  • 3-bolt — 3-inch OD
  • 4 finish options:
    • As Cast (Standard)
    • Satin (optional)
    • Vibratory Polished (optional)
    • Mirror Polished (optional)

The Ultimate Header Investment Cast Collector Flange is 30% lighter than the typical 3/8” thick laser cut flange.