The Holley 142-00 is a blank emulsion jet for tuning the emulsion circuits of Ultra XP and Dominator billet metering blocks, as well as the 0-80787-1 350 CFM 2-barrel. Supplied as a no-hole (.000 in.) brass blank with a 6-32 thread, it lets an experienced tuner drill a custom emulsion size for precise fuel-curve control. Emulsion changes should only be made by a competent tuner with the correct test equipment. Sold as a pair.

Holley 142-00 Technical Specifications:

• Blank emulsion jet for custom drilling
• Fits all Holley Ultra XP and Dominator billet metering blocks
• .000 in. no-hole brass blank, 6-32 thread
• For advanced carburetor tuning
• Sold as a pair