RE: 06 3.7L performance
tb spacers from what ive heard are an expansive paper weight and not worth much more and i tend to agree. Chip, exhaust, intake, fans, pullys may work. Maybe a nos system. not sure if a supercharger is an option, i havent look honestly. Hope you can find what works for you, but you may be better off trading for atleast an 08 4.7L m8.