THE ORIGINAL COOLANT CROSSOVER O-RING REBUILD KIT - unfortunately, other sellers on purchased kits from me and started selling them as well. Support the original and receive unsurpassed service and knowledge here. THANK YOU! For sale is an o-ring kit to rebuild one Ford Mustang SVT Cobra coolant crossover tube or pipe. Kit includes one o-ring for each of the tube to block connections, one o-ring for the tube splice connection, and one o-ring for the coolant crossover fill or burp plug. These are UPGRADED 75D VITON o-rings. They are better suited for coolant and will last longer than the OEM o-rings, or other o-rings found in generic kits from parts stores. These kits are also an exact fit for 1993-1998 Lincoln Mark VIII 8 cars. If you are only looking for a crossover fill or burp plug o-ring, shoot me a message. Also, if you are looking for a kit without the fill or burp plug o-ring, again, shoot me a message. Any other questions, feel free to ask. Thank you for looking.