We offer free tuning updates to our direct customers when upgrades are purchased directly from us. Currently a 5-8 day lead time on shipping from Full Force Diesel. This item is drop shipped from our supplier. *A return label for your cores is supplied for your convenience. Proper return packaging is supplied to you by Full Force Diesel to return cores back to them. If you choose to not do a core fee you shall be responsible for any damage done to the cores during shipping. In the event there is damage to the cores during shipping you shall pay all additional fees for replacement parts. Your order will not ship until FFD receives your cores. All core fees are refunded to the credit you used when placing your order. Your refund takes up to 3-4 weeks to receive after Full Force Diesel receives your cores. *For All International orders cores MUST be received by Full Force Diesel and inspected before orders can be shipped. When shipping cores back please indicate on your label the following notation, "Return to sender if undeliverable". This is crucial if the cores get misplaced.