JB4 VR30 Fuel Wires ADD-ON
These extra wires plug into the JB4 harness allowing it to tune your air/fuel ratios, leaning the tuning out at higher RPM has resulted in significant additional power gains.
These extra wires plug into the JB4 harness allowing it to tune your air/fuel ratios, leaning the tuning out at higher RPM has resulted in significant additional power gains.