well TTI is great unless your car is manufactured wrong like mine was...my 71 barracuda 440-6 the pipes hit everything but the lottery, the tips stuck out to far...a total waste of 1000 bux if you ask me. when I called they told me my car must be manufactured wrong and it couldnt possibly be thier tail pipes...have a local shop bend you a system and put the other 600 bux into something else