Protex Ball Joint BJ318 Ultra-Select Bypass style thermostat with pressure

Bypass style thermostat with pressure relief hole

2 bolt holes

The multi-layer metal shim helps absorb noise for quieter braking

Conventional style thermostat with inverse jiggle pin

If the air filter is blocked or dirty the filter’s ability to reduce dirt passing directly into the engine is greatly reduced

Protex Ball Joint BJ318 Ultra-Select Bypass style thermostat with pressureA ball joint serves as the pivot point between the style and the suspension. Prosteer Protex ball joints are manufactured to exacting standards and offer a rigorously tested, high quality, application specific solution. Specifications Featuring both upper and lower ball joints, suiting passenger, 4WD and light commercial vehicles. Batch coded with laser etching for traceability and quality control. Various designs available including mechanical (hard