Check the listing for details. GM 12557840 Harmonic Balancer Bolt for 1997 LS Engines 4.8 5.3 5.7 6.0 6.2. Condition: New. Listed at 9.95 USD. GM 12557840 Harmonic Balancer Bolt for 1997 LS Engines 4.8 5.3 5.7 6.0 6.2 Brand New! Harmonic Balancer /Damper bolt - Torque to yield!Genuine GM BoltOEM# 12557840Fits All GM Gen3, 4, & 5 Engines - Will not Fit LS7 / LS9 / LT4 or LT5 Motors1 Bolt Per packaged Made in The USA Customer Service Policy: All Orders Shipped Same Day By 1pm EST or the next business day Fed-Ex shipping* is available for orders with delivery addresses within the US and territories, excluding PO Boxes and Rural Routes. USPS shipping is available for orders with a PO Box, Rural Route, or APO/FPO/DPO address. Orders shipped to a PO Box or Rural Route will arrive within 7-10 business days. Orders shipped to an APO/FPO/DPO address will arrive in 3-5 weeks, not the standard 3-5 business days. *Final delivery will be made by USPS. This will not affect the standard delivery time frame.