Overview Reviews Product Description 566-102 Holley EFI Holley EFI Dual Sync Rotor (Gen 1) Holley EFI Dual Sync Distributor Service Rotor.Featuring a low resistance brass terminal material, and included mounting hardware. Product Videos Custom Field Product Reviews Write a Review Write a Review × 566-102 Holley EFI Holley EFI Dual Sync Rotor (Gen 1) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *