WELCOME TO DISCOUNT CENTRAL ONLINE Business hours: Monday - Friday 9am - 5pm / Saturday, Sunday and Holidays we are Closed. Technical Details:QPower Quad 8" Ported Empty Woofer Enclosure Box For GMC CHEVY 2007-Current Crew CabModel: QBGMCFF074084 hole 8" Ported for GMC/Chevy 2007-Current Crew CabUnderseat FrontfireFinished with Durable Bed Liner2007-Current GMC/Chevy Crew CabAir Space:0.8 Cubic Feet (per sub)Mounting Depth: 11.25"Tuning Frequency: 35HZ Shipping Information: We are Free Shipping to All US continental Street All orders will be shipped via UPS, Fedex or USPS (Insurance is Included) Terms and Conditions: All our Products have 30-days Return Policy starting from the date of purchase. Must request an RMA# (Return Merchandise Authorization). All returned merchandise are to be tested and inspected according to reasons/ claims why it is being returned before any decisions will be made. All returned merchandise must be in original factory carton, including all packaging materials, inserts and manuals, warranty cards (not filled-out) and all other accessories (i.e. screws, bass knobs, plastic coverings, protective films, etc.) Failure to meet any of these requirements will result in a higher restocking fee or denial of return request. All DOA (Dead on Arrival)/ Defective items must be reported within 48 hours after receiving the item. Shipping charges are non-refundable. Only the purchase price of the product is refundable. When ordering for a Car Alarm Replacement remote make sure you are ordering the correct one or give us a call to check if it is compatible with your Car/ Car alarm. This is to avoid returns and paying for restocking fee charges. REFUNDS, EXCHANGE, AND REPLACEMENTS: Applicable only for items purchased within 30-days. IMPORTANTLY, DEFECTIVE OR NON DEFECTIVE All Items should be returned in a good/ well-packed condition. Failure to comply with our Terms and Conditions may lead to UNAPPROVED RETURNS. All UNACCEPTABLE RETURNS are subject to 20% restocking fee and UNAPPROVED RETURNS are subject to NO REFUND, EXCHANGE, REPLACEMENT, and OR REPAIR. Reasons for unapproved returns: Physical damage: Item is scratched, torn, wet, burned, blown, signs of misuse, and faulty installation DEFECTIVE or non DEFECTIVE Reasons for unacceptable returns: Factory sealed items: If it’s opened and tampered except for certain items REPAIRS: Applicable for items purchased more than 30-days but not later than a year. Brand new: All purchased brand new products have 1 year warranty from DiscountCentralOnline. Refurbished: All purchased refurbished products have 90-days warranty from DiscountCentralOnline. Payment Information: We Accept Paypal Payment and other Credit card (Visa, Master Card & Amex)