Ok i can give u a rought translation of what they do.
Well they port the crankshaft that all i can get out of it.
go there and click on KONDO...
then they have all the engines. Maybe ill get a 12TR Turbo cause its no where near as expensive as the other mod engines and i will do a review on it. But it might sound strange cause this will be my first proffessional standards engine so it should kick but.
And its only 274 USD which is not bad. but some go up to 721$
PS it says this does not comply with JMRCA rules. JMRCA is the japan racing series.
hope this helps.