BPP SR20 Head Rear Coolant Fitting Fitting Size:-10AN Proflow's Mastertorque starter motors are

Proflow's Mastertorque starter motors are rated with high cranking torque figures and feature an offset gear reduction for increased performance

Conversely

– FPR Kompact

Dirt repel wont do that

a robust four-bolt steel main cap configuration

BPP SR20 Head Rear Coolant Fitting Fitting Size:-10AN Proflow's Mastertorque starter motors areBillet Performance Products SR20 Rear Coolant fitting. Designed to help water flow through the rear of the cylinder head to even out temperature. No Drilling required, just remove the welsh plug and bolt in using existing thread. Comes with 12AN or 10AN Fitting Works on S13, S14, S15 and VVL Heads