TBS work best on carborated engines (To early to spell right..... and i was told this buy a local performance shop). They are overpriced paperweights in fuel injected engines. (Again this is what I was told by a performace shop... Im not claiming that I know this to be true, but it was enough to sway me from getting one.)
Big D....is right they dont work on FI port injected engines..no gain...There is dyno proof that they work on carburated or throtle body injection...dont waste your money..