Cart Continue shopping “Holley HP EFI 4v 4.6 / 5.4 Standalone ECU & Harness” has been added to your cart. Product Price Quantity Subtotal × On 3 Performance 4.0" 5 Ply Silicone Coupler $14.50 On 3 Performance 4.0" 5 Ply Silicone Coupler quantity $14.50 × Holley HP EFI 4v 4.6 / 5.4 Standalone ECU & Harness $2,425.98 Holley HP EFI 4v 4.6 / 5.4 Standalone ECU & Harness quantity $2,425.98 Update cart Cart totals Subtotal $2,440.48 Shipping Shipping costs are calculated during checkout. Tax $0.00 Total $2,440.48 Proceed to checkout