NASCAR Car Harness Racing Communications Slim-line molded Y-block and are

Slim-line molded Y-block and are pre-wired for easy installation in any type of helmet

Supports IMSA helmet kits with IMSA-to-NASCAR adapter

It uses a 680 Ohm noise-cancelling Electret Condenser Microphone

While this helmet kit is wired like a typical NASCAR style helmet kit

NASCAR Car Harness Racing Communications Slim-line molded Y-block and areNASCAR Car Harness (3 Conductor) 1 4" Switchcraft metal helmet jack for lasting durability 3 Conductor System using 1 4" Stereo Jacks and Plugs Robust Y Block with 6 foot leads for helmet and PTT (Push To Talk) Use with 1 4" NASCAR Helmet Kits Supports IMSA helmet kits with IMSA to NASCAR adapter. EasyLink 5 pin connector allows use with most hand held radios