I had Ultimate Converter Concepts build a custom converter for my car recently. The difference between a good converter and the junk I used to have in there was night and day; dramatically more torque, better idle, less RPMs out on the highway, like a stock converter during light throttle, step on it and engine is in max torque immediately every time. Money well spent wish I would have done it sooner. Don't buy a cheap converter that ends up holding your engine back.