Support the original Cobra O-ring seller and receive the high quality parts that your vehicle demands! Several other sellers have purchased o ring kits directly from me and started selling their own kits. They’ve even gone so far as to copy and paste my description and instructions directly into their listings! Support the original o ring rebuild kit supplier and have peace of mind knowing you’re purchasing the high quality originals that will stand up to anything you throw at them. This o-ring kit includes all the necessary o-rings to rebuild one 1996-2004 Ford Mustang SVT Cobra, Mach 1, or GT oil cooler. Includes 6 o-rings in total (one to replace each o-ring in the assembly), installation instructions, diagram, and torque specs. When paired with the correct oil cooler to engine block gasket for your application, this is everything needed to fix up a leaky or otherwise worn-out oil cooler. Professional installation is recommended. At a certain point, the oil coolers fail on these vehicles and usually it is an o-ring. The oil cooler has both oil and coolant flowing through it, and if an o-ring wears out, can create cross-contamination, or a "milkshake" like appearance in either the coolant or oil. This can commonly be mistaken as a blown head gasket (this actually happened to my 2001 Mustang SVT Cobra). I was pleasantly surprised once I replaced all the oil cooler o-rings, and no longer had any mixing of my oil and coolant. Note that this o-ring kit will also work with 2003+ FRPP Aluminator engine as well as 2009+ FRPP 5.0L Boss Motor. Please confirm that your vehicle has an OEM oil cooler on it before ordering. Thank you.