GSC Power Division billet R3 camshafts for Ford F-150 Coyote Gen 3 are listed as a 300/316 pairing for ported-head applications and note a required valve spring upgrade. These billet profiles are intended to replace stock cams on engines with ported heads, changing valve timing for more aggressive operation at higher rpm ranges. Use with appropriate valvetrain and tuning modifications for safe, reliable results.
GSC P-D Ford F-150 Coyote Gen 3 (w/Ported Head) 300/316 Billet R3 Camshafts (Req Spring Upgrade)