Overview Reviews Product Description 566-101 Holley EFI Coil On Plug Blank Cap Works with Holley EFI Dual Sync Distributors Product Videos Custom Field Product Reviews Write a Review Write a Review × 566-101 Holley EFI Coil On Plug Blank Cap Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *