I know most do not know this guy but he builds great converters. Hi name is Greg Slack http://gregslackconverters.com He as built alot of IHRA racers and some NHRA racers..Troy Coughlin won the NHRA Pro Mod Championship last year with one of his converter..Also the Q80 Pro Mod Turbo car runs one.He is building one for the guy I drive for now.It is an IHRA H/R class car and brackets runs 6 teens in the 1/8.All the people that I know that has one of his says he hit it right on the first time.