These might not be exactly what you are looking for but they are an option. I was looking for longer shocks for my 05 king cat build im doing. Watched ebay for about 2 months and decided for the price these were selling for new it was worth a try. I'm not sure if you're supposed to measure ctc with air or not but with 60 lbs of pressure these are the 16.8 it mentions in the product description.