I'm not familiar with longevity of the Roush, but the KW and ST have great longevity. As you're probably aware, KW makes the ST with the main difference being that the ST are not coated for corrosion resistance. We've seen a set of ST rust-out here in Chicago in 1 winter. That being said, one of...
I take my GT350 to Performance Eurowerks in Buffalo Grove. Don’t let the name fool you. They build track cars of all variants. Best way to get a hold of them is via FB or email.
Sorry if this topic has been addressed already, but is everyone with the ATAK just dealing with the buzzing noise at certain RPMs from the flaps/valves? It's terrible when they're closed, which is understandable, but I can still hear it at lower RPMs when they're open.