Somewhat facts regarding the engine fore people who don't know. The engine is from a 1999-2005 Japanese Toyota Aristo, which is similar for the twin turbo Supra engine, but utilizes variable valve timing. Was disappointed after 3 weeks trying to find a very low mileage 421b for my faulty engine. https://jdmsubaruej20turboenginei04815.blogdal.com/32949142/5-tips-about-motor-rb26-you-can-use-today