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If you'd rather build it than buy it, we have just what you need with our weld-in bungs. Whether it's a fuel cell, catch can, oil tank, or anything else you can imagine, we offer high quality Made in the U.S.A. aluminum weld-in bungs in multiple sizes to fit your fabricating needs.

1/8" NPT has a 5/8" step
1/4" & 3/8" NPT has a 7/8" step

Advanced Chassis provides another new improvement for racers and rodders alike. Cell users can now easily upgrade their Cells from troublesome Flip style filler or Bail cap , to the popular non-vented, Easy Turn Fill Cap Assembly. This assembly is direct bolt-on replacement and is a simple installation.

The positive grip finger notches of the Easy Turn Caps are easy to get a hold of . Featuring quick starting coarse threads , these caps are appreciated by everyone who uses them. Each is standard with a positive sealing radial squeeze o-ring, which also holds the cap secure.

Easy Turn caps are available in a large selection of Pro-Werks Brilliance Anodize Finish colors or beautiful Micro-polished aluminum. The bung of this assembly is Silver anodized for lasting durability, and includes the necessary mounting hardware.

Both the cap and bung are precision CNC machined to exacting tolerances, of light weight billet aluminum, right here in the USA.