Depending on the radio, it may not even work properly if not grounded. What kind of radio do you have that doesn't come with a ground on the harness? I've never seen a radio that didn't have a ground.
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2003 GSR EVO
HFC, Greddy SP2 Exhaust, HKS intake, Megan Exaust manifold , Megan O2 turbo outlet, reflash, AVC-R@21 PSI, walbro 255, HKS 264 I/E, Shep stage 2 Transfer Case with Ralliart LSD. Blox polyurethane front engine mount.
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