If you are looking to rebuild your 1.8L BP engine and put a little more power in it while you are doing it, look no further! The Maruha Original design 87mm crankshaft is your solution.
 
Utilizing high precision casting and a lightened weight of 1kg compared to stock, this crankshaft is what you need to effectively increase your displacement and add a significant amount of ponies to your NA or NB 1.8L Miata.
 
With the added stroke of 87mm, the BP engine can be configured to become either a 1.9L or 2.0L displacement.
 
For extensive information on how this crankshaft works, please visit our tech article regarding this crankshaft here -> Maruha New BP 85mm and 87mm Crank Shaft Explained
 
This item has Free shipping within USA and Canada via UPS ground.
 
Price is only for the crankshaft. Other required and related parts not included such as crankshaft bearings, seals, headgaskets.