Do I need a new converter?

I ran cheap off the shelf converters for years. Then I invested in 2 custom converters for my 2 cars both are 8in. Best money I ever spend on my cars. 60 ft. was better, e.t. dropped and mph went up, plus way more consistant. Most important part of the car for performance. Call a good company and tell them what you need. Dynamic, Ultimate, Turbo action, Ptc, ATI, etc. all good.