one word: UPrev for tuning.
2nd: ditch the dual exhaust, your losing bottom end torque, and top end power. The Titan`s only exhaust system is a Y merge pipe.
stock manifolds > Cajun B pipes, Cayun Y merge, Cayun mandrel bent pipes, Borla, Magnaflow, or JBA muff...
headers> Cajun B pipes > ditto...
2nd: ditch the dual exhaust, your losing bottom end torque, and top end power. The Titan`s only exhaust system is a Y merge pipe.
stock manifolds > Cajun B pipes, Cayun Y merge, Cayun mandrel bent pipes, Borla, Magnaflow, or JBA muff...
headers> Cajun B pipes > ditto...