cryotreating and shotpeening isn't the wonder solution its made out to be. at the level of power you are talking, neither of those processes on stock or gtx gears is going to make them exponentially stronger to the point where you'll be able to push over 400whp without thinking twice. i've seen cryotreated 4th and 5th gears from a G series rip apart at 350whp. the transmissions were never designed for that kind of abuse. one guy has done lubrication improvements to the transmission for his MSP. there are the PAR gears. are they alot of money? of course. are they worth it? of course. the phrase "you gotta pay to play" is 110% honest. i'd rather plunk four digits on gears and a trans job once than go through transmissions like water. not trying to be a dick, but thats what it comes down to for this community. good options are limited, and often expensive sadly.