Bypass your fuel injector (ballast) resistor. Features flush design. No solder - Crimp connections are internally linked and sealed. Suitable for EVO 4-6 (CN9A, CP9A) and EVO 7-9 (CT9A). For use with high impedance injectors (highZ) injectors such as FIC. If you have any questions about this product you can contact us on the Facebook page.