You have one of the best tuners in the US in Berea, Ohio, just south of Clevland Hopkins International Airport.
They specialize in C5/Z06 Corvettes.
They also do development work for GM and prep race cars.
They have prepped the WC Cadillac CTS-V's and WC Corvettes, Silver State Classic Corvettes, SCCA T1 cars and a some very mean and sinister street machines as well.
It is worth just going there and taking a tour of the shop.
Mallett Cars, LTD
Contact Chuck Mallett and tell him I sent you.
BTW Corsa Performance is right down the street.
Jim Browning, Jr. will be glad to show you his plant and the Titanium race exhaust systems.