For sale is an aftermarket forged crankshaft for the Aston Martin V12 engine. 

This engine has a stock stroke of 79.5mm. With this forged crankshaft the stroke will drop to 57mm, making the engine 4.3 liter of capacity. With this shorter stroke you will be able to rev the engine over 10.000RPM if you have the supporting mods (required on an engine build). 

You like the sound of the Valkyrie engine, but you don't have 3 million dollar spare? 

With this crankshaft you can build a 10.000 RPM V12 on a budget! Besides the block you do need rods, pistons, valve springs and such. I can help you with that or find a good engine builder or tuner near your area. 

The aston engine is a very nice engine that is also a good candidate for an engine swap in a RWD platform like a Toyota Supra, any BMW or a Nissan 200SX.  

You will loose quite some torque and horsepower with the lower stroke, but adding turbos will fix that. Do some research how a 10.000 RPM with twin turbos sounds and you know what your next winter project is going to be! 

Any questions feel free to send me a PM. 

Here are the technical specs of the crankshaft: 

Engine: Any Aston V12 engine like in the DBS, Vantage V12, Vanquish and others Stock 

Bore: 89mm Stroke: 57mm 

Main bearing journals: 67.5mm Same as OEM Aston Martin (ACL H bearings available). 

Rod bearing journals: 47mm (3mm less than OEM. 47mm is also a ford dimension, so bearings are widely available). 

I can supply the rods and pistons that need to go with this build, send me a PM for details. Note on the pics you see some dirt on the main journals. This will polish off, the crank is with some greasy oil and obviously needs some cleaning and polishing before assembly.