Many have been running 400whp with out upgrading the axles. I recently pulled mine for a clutch job and they seemed pretty nice; well cut teeth and some good heft to them.
How much are you looking to run?
Yeah i love that kit because its just so perfect for street and strip. I was originally going to get the 42r but ams said that the 42r was more of a (track only) turbo and that the 35r was just perfect for both
Ran across this from The Drive Shaft Shop;
"The Evo V111 front axle are larger that the 1st and 2nd gen. cars, The ends were made from a material close to our 4130 chromoly and quite strong. The bars were not they were a very brittle material and any car over the 500HP range might want to consider [an] upgrade..." http://www.driveshaftshop.com/MitsuAWD.ivnu
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