Note: Some 172 Models require 2 wires, some 3 wires and some require 4 wires. This Kit is put together to provide enough baffle wires and springs to all. If your model of 172 only requires 2 wires, please feel free to order 2es 20" baffle wires and springs, or share this kit with a friend. Stop wasting your time or your A&P's time trying to make baffle wires! Do the math, there are 2 to 4 wires needed the 172 with a Lycoming and let's say it take 7 minutes to make a wire. @$120/hr, that is $56 for wires (however they look) and you still have to find the right springs! Most folks just go to the hardware store and find a spring that looks close. Any good A&P knows that the right compression spring will reduce chaffing. Our compression springs are custom made to meet the compression requirements. This baffle wire kit will work on a 1968 to 1996 Cessna 172 with a Lycoming O-320 or (I)O-360 that use baffle wires. The C172 Lyc kit contains 4 each 20" baffle wires - use to make the 0450277-12, 0450277-13, 0450277-14, 0450277-15, 0450277-212, 0450277-213, 0450277-214 or 0450277-215 4 each baffle springs Extra 20" wire, just in case... Wire bending template These baffle wires are not TSO or PMA parts. You or your A&P will finish making the baffle wire by cutting the wire to the length needed and using the old wire or the provided template to make the “hook” end. You have assisted in producing the wire making it an owner produced part (FAR 21.9) The wires and springs are made from zinc coated ASTM A-228 music wire. They were tested against OEM Cessna baffle wires and passed our rigidity, bend retention and dead weight testing. The last image shows a tip we received from a customer that did not have any of the old wire to use as a template. They installed the straight wire with the spring as normal. Then they pushed on the head of the wire compressing the spring completely and marked the wire where the hole is. Measuring up a 1/4" they made another mark where they started the bend.