plus you have twice as many things to go wrong. plus more money in the start up of the build. They make a trans brake to leave out of the whole. Or something called methanol, or a lil juice for that matter. And if you cant get your car too spool that well you have a badly built kit. I have no problems making my 82mm spool down low. Granted it doesn't start building boost @ 1000 rpms like a supercharger. But it does plenty for whats at hand.![]()