This is a once very expensive forged racing crankshaft. I just had it polished and checked out great.See all photos for more specific specs.I must reiterate this was a very Expensive! Crankshaft it’s just the wrong stroke for our application. Selling cheap. If UPS shipping turns out to be cheaper I will reimburse you the difference. I had it checked exact stroke is 4.125 I believe you need an aftermarket block or wide rail rocket block for this crank. Has 2.100 rods journals.See all photos for more specs. I had it rechecked out my local machine shop.4.125 stroke.