I can't say that I decided for certain in terms of brand, but the southbend is seemingly the better value. User thom000001 ran the stage 5 on his car which made 700+whp for a considerable time......and passes. They also have a favorable rep in some other car communities. I have used ACT in the past, and liked them. I just feel they are bit overpriced.

 

150 shot here with RPS 6 puck and flywheel. 40k miles later hard driving and drag passes still like day 1. Clutch is pretty stiff. Way more then oem. Dj smitty(Derek) has it on his 541hp TT z so I went that way even though I'll never have that power. Ordered from injected where I got a unbeatable deal.