:You should at least know what you have under the hood of your own car. They are still cast just high silicon content. 958rwhp is impressive for a few runs however. : : sorry that's what a lot people say on Supraforums...... doesn't really matter what they are based on their performance.
91 300ZX 528 whp/553 wtq, 95 Supra 403 whp/402 wtq