I've been using stock axles for years, most have been refurbished ones from advanced auto. Been running low elevens and high tens for the past three years on stock axles and have broken 1 on the track and that was due to a broken motor mount. Preloading is the key in a fwd when launching on slicks, once you learn how to do that it takes a ton of stress off drivetrain. If youre breaking axles with a stock swap, youre obviously doin it wrong.