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Features, Description, Q&A, Specs & Installation
Eliminate the Weakest Link in Your Mustang’s Cooling System. If you own a 2005–2010 4.0L V6 Ford Mustang, it isn’t a matter of if your factory thermostat housing will fail, but when. The original factory unit is made of a lightweight plastic composite that constantly cycles through extreme heat and pressure. Over time, this stress causes the plastic to degrade, resulting in hair-line fractures that frequently split along the molded center seams. This design flaw leads to sudden coolant leaks, engine overheating, and potentially catastrophic engine damage.
The Permanent Aluminum Upgrade. OPR solves this notorious factory flaw once and for all with their OE-Style Aluminum Thermostat Housing Assembly. Engineered as a direct-fit replacement, this upgraded housing ditches the fragile plastic construction in favor of heavy-duty cast aluminum. It retains the exact physical dimensions and routing of the original equipment (OE) parts, but delivers the rugged durability required to handle high-pressure cooling cycles without warping, cracking, or splitting.
Application. This OPR OE Style Aluminum Thermostat Housing is designed to fit 2005-2010 Ford Mustang V6 models.
OPR 487372
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
What's in the Box
OPR offers our valued customers the following Limited Warranty on all OPR product purchased after September 1st, 2026.
What is Covered
Subject to the terms, exclusions and limitations herein, and with respect only to products first sold in the United States, OPR warrants that its products shall be free of manufacturing defects for five (5) years from the date of initial retail purchase when the OPR product is installed and used on purchaser's vehicle according to supplied product installation instructions and/or warnings. This Limited Warranty is made only with respect to the initial purchaser and is not transferrable. OPR reserves the right to require proof of purchase as a condition of this Limited Warranty and to make future revisions to this product or its Limited Warranty without obligation to provide notice of same to purchaser or to conform existing product to future revisions. Any change to this warranty made after purchase may be applied retroactively at the sole discretion of OPR.
What is Not Covered
Your OPR Limited Warranty does not cover damage or claims to any component, vehicle, or person other than the OPR product purchased. Your Limited Warranty is expressly limited to replacement of the item itself shall OPR determine item was not free of defect. As such, this Limited Warranty does not cover damage or claims to any component, vehicle, or person OPR determines to have been damaged by or subjected to:
Remedy Limited to Repair/Replacement:
The exclusive remedy provided for products covered under this Limited Warranty shall be, upon OPR's inspection and at OPR's option, either repair or replacement of product or parts (new or refurbished). Any parts repaired or replaced will be considered part of the original product and will not extend the term of Limited Warranty. Customers requesting warranty consideration should first contact the independent distributor selling your product to obtain a Returned Goods Authorization number. All removal, shipping, and installation costs are customer's responsibility. If a replacement part is needed before your part can be returned, you must first purchase the replacement part. Then, if OPR determines the part warrantable, you will be credited the purchase price of that part.
This warranty is the only warranty made in connection with the purchase of this product. OPR neither assumes nor authorizes any manufacturer, vendor, retailer, other person or entity to assume for it any other obligation or liability in connection with its products or this Limited Warranty.
Other Limitations - Exclusion of Damages - Your Rights Under State Law:
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