Rugged Radios Expand to 4 Place - STX STEREO Alpha Audio Helmet Kits MT-IDM-RM60 The standard non perimeter seal

The standard non perimeter seal Racing Optics tear offs are OK

engineered to handle gas and alcohol

2-1/2 Wide Camaro Type Spring

and more are included in the Plus version but you also get more

High Flow Runners

Rugged Radios Expand to 4 Place - STX STEREO Alpha Audio Helmet Kits MT-IDM-RM60 The standard non perimeter sealExpand your two person STX STEREO intercom system to 4 persons with this Helmet Kit expansion pack. Experience high fidelity true stereo in comfort and performance with the STX Stereo Helmet Kit! This complete STX STEREO flex boom helmet kit features Rugged Radios Dura Link Sealed Connector, Clear Hear stereo speakers and dynamic noise canceling mic for the best audio performance. Features: High Fidelity true stereo Loud Alpha Audio Speakers Full Flex