Simpson Memory Fit Fire Resistant Racing Undershirt - SFI 3.3 NKA race‑grade performance to the rear

race‑grade performance to the rear axle of BMW E36/E46 (and compatible models)

The AIM CHT (Cylinder Head Temperature) Sensor is designed for measuring engine temperatures on most racing karts

Not recommended on the rear axle

Complete coiled cord helmet wiring kit with NASCAR style plug

Nomex fleece liners used by the competition do not absorb moisture well and are not as durable

Simpson Memory Fit Fire Resistant Racing Undershirt - SFI 3.3 NKA race‑grade performance to the rearSimpson's Memory Fit line of fire resistant racing underwear features a unique fabric that becomes softer with age, guaranteeing a fit that is made just for you! The lightweight, anti microbial treated fabric bends, moves, and stretches with you, reducing bunching and driver discomfort. Athletic cut, and contrasting stitching gives a stylish, modern look.