Nice looking piece, but the material choice is probably overkill for the application. Big advantage of Chromoly is strength to weight ratio, but I don't think a gram or two in this piece is going to make a difference. 4140 is a lot more common, I asssume cheaper, and would probably be a good choice of material for this piece.

It is forged 4340 chromoly tool steel that is machined from an ingot by a 5-Axis CNC Mill, then oil-grooved, shot-peened, heat-treated and carbonized. Rockwell hardness is around 60-62. That results in an approximate tensile strength around 115,000-120,000psi. It is essentially classified as a hardened tool steel part.

It is by far the strongest cross-shaft on the market for these vehicle applications and provides owners with complete streetability on high-horsepower AWD applications. Instead of machining down the stock cross-shaft to accept 4 spider gears, this part started from scratch with better material, a beefier structure, surface hardening, and oil passage grooves on its posts to provide proper oiling to the spider gears to prevent surface galling.

The Beyond Redline Performance cross-shaft has been proven to hold over 1000HP and 950TQ at the crank on my race car for the last 5 years without signs of galling or damage. It has been proven on the race track, the street, and the dyno to survive the harshest conditions without failure.