Cart Continue shopping “On 3 Performance (2015-2016) Mustang GT 5.0 o2 Extension Harness” has been added to your cart. Product Price Quantity Subtotal × On 3 Performance (2015-2016) Mustang GT 5.0 o2 Extension Harness $35.00 On 3 Performance (2015-2016) Mustang GT 5.0 o2 Extension Harness quantity $35.00 Update cart Cart totals Subtotal $35.00 Shipping Shipping costs are calculated during checkout. Tax $0.00 Total $35.00 Proceed to checkout