The guarantee they give is nice, but 90% of my customers, who I’m sure some will chime in, have never had a CEL with the vibrant spacer I sell as an option. The other 10% have had to make adjustments (the spacer is adjustable in two different ways).Personal preference really.
AWE guarantees no CEL, which i have and it is worth every penny.
IF CEL is not concern, I'd go with GTI Jake's DP.
This is also true. Flash tune will code out the CEL so you don't even need a spacer. Jake puts together a great package as well.I believe you don't need to worry about a CEL with a flash tune. If you're only doing a piggyback or nothing at all, I see Jakes is the way to go if you don't want a mass produced pipe.