IMSA Car Harness Racing Communications While this helmet kit is

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

The 2015 Nerdie NASCAR Car Harness features a larger inline PTT allowing room to offer an optional 3

flexibility and abrasion resistance

The Nerdie NASCAR Helmet kit is made with high quality

NASCAR Car Harness (3-Conductor)

IMSA Car Harness Racing Communications While this helmet kit isIMSA Car Harness NEXUS U 92A U for lasting durability (M9177 3 1) 4 Conductor System using Nexus Jacks and Plugs Robust Y Block with 6 foot leads for helmet and PTT (Push To Talk) Use with IMSA Helmet Kits EasyLink 5 pin connector allows use with most hand held radios