Ford Mustang Valve Spring Insert - Shim - .060 Thickness - 260 V-8 Ford Mustang Valve Spring Insert - Shim - .060 Thickness - 260 V-8 Welcome to our eBay store! Payment We accept the following forms of payment. PayPal   Sales Tax We are required by law to collect Sale Taxes at your local municipality rate Shipping Shipping rates will vary by the size of the product. Please use the eBay shipping estimator to calculate your shipping fee. Discounts are given for combining multiple items in one order.