ok so 1000hp is my goal and i am pretty much there just a few more psi. So the question now is can the r154 take it. I built this trans about 3 years ago and have been waiting a long time for it to break. All stock parts no upgrades i see threads with broken r154's but most don't open it up to see what broke. Next problem is i think the clutch will slip soon and i need a remedy for that. The clutch is a act extreeme with a stock flywheel and is just about worn out. I thought of the spec twin but they have unsprung hubs and i think that will put undo stress on the trans during shifts. The os giken only holds 650rwhp? So what are my options did i miss another clutch option at this time?