Racequip Neck Support Collar - Black - Adult 21 in. - 337009 Boost Gauges MS1-XXR6 features a MaXX pressure

MS1-XXR6 features a MaXX pressure plate for the serious enthusiast

HY5-HDG6 kit features ACT's most popular Heavy Duty pressure plate

This bracket features 1/8 NPT threads so that both barbed fittings (included) and AN fittings can be used interchangeably

In order to make sure this could keep up with high power levels

Racequip Neck Support Collar - Black - Adult 21 in. - 337009 Boost Gauges MS1-XXR6 features a MaXX pressureThe RaceQuip SFI Rated 360 Degree Helmet Support Neck Collar is made of high density flame retardant foam which is covered with a woven FRC fabric. Used in auto racing to hold the helmet up off the driver's shoulders and provide a cushion between the helmet and shoulder blades or chest. The round tapered wedge design measures 1 3 4" tall in the front and 2 1 4" tall in the rear. The fully closed measurement allows for up to a maximum neck size of