I have to say go with the cryo treatment. If you ve seen the new Turbo mag, there was actually an article about this and the added durability of parts due to this. Quoted From Turbo Magazine" Raymond Wildman competes (in competetion tractor pulls, which put ALOT of stress on their engines)in an International Harvester 1066 tractor with a turbocharged six cylinder. The tractor was running strong, but his turbo was lasting no more than six pulls( am mere 1800 feet). 300 Below(In Illinois) cryo treated an unassembled turbocharger and all of the turbos' parts. With no other changes to the tractor, with the exception of the now cryo treated turbocharger, the turbocharger was finally pulled with a bearing problem, after 140 pulls. Quite an imporvement over the origanal six he was getting before." So as you can see, espcially on turbod vehicles, cryo treatment is very much worth it in my opinion. What cryo treating actually does is allow the molecules of the steel to bond together closer and tighter, thus making the said metal much stronger. This is escpecially beneficial on a turbod motor because of the high internal temperatures that turbod motors see. Sorry so long, jsut had a lot to say on this one.