Cryo processing
I know this post is pretty old but I thought I would comment any way. Cryogenic processing works, it does not fix everything but it will relieve residual stress, increase strength, improve wear resistance, and improve heat dissipation properties among a few other benefits. The question is, depending on your part and its composition, will you notice the difference. Most people want to see the change right now but when something extends the life of the part or makes it stronger you have to wait to see. There are people who use faulty practices and rush the cryo process and because of this do not have good results. I am processing some Saginaw 3 and 4 speeds for some dirt track racers with very good results. There have also been some processors who treat spark plugs and claim to gain 9-25 hp, I have yet to try this but will soon. Pricing is usually affordable and most processors will charge by the pound on a gradual scale. $5 per pound to $8 per pound aprox. It is important that cryo processors use computer controlled freezers, ascent and descent rates no faster than 2 degrees per minute, get to -300f or colder for 24 hours and for ferrous metals do a mild heat temper afterwards. There are many NASA studies available on the subject as well as major manufactures that use this process like Benelli, and John Deere. If you are interested try it out it won’t hurt and some guys will process a part for free so you can see for yourself. I hope this has helped answer some questions on cryo processing thanks.