Description

Temperature sending unit and nut for later model roadsters that use the metric nut; typically 67.5 – 70 SRL311 and SPL311 model roadsters with an aluminum head. The 4″ bolt (actually 2 stud and 2 bolt) thermostat tower is another way to identify the later R16 metric heads; all U20 heads use this later metric nut. Nissan and Aftermarket.