StacksVerified U.S. regulatory reference

33 CFR §183.440

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each conductor in a secondary circuit of an ignition system must meet SAE Standard J557.
  2. (b)The connection of each ignition conductor to a spark plug, coil, or distributor must have a tight fitting cap, boot, or nipple.