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All I can say is what ever u do dont run Aero turbine on ur 4.8.I had one on mine and my truck couldnt get out of its own way.I know we have a bunch of Flowmaster bashers here,but I put a flow on my truck now and it runs alot better.
now try magnaflow and i guarentee you you'll be able to eel a gain in performance...i felt a little bit of gain when i switched to magnalfow to flowmaster...
Originally Posted by L33Z71
True duals are WAY overkill for an N/A 4.8. The 4.8 likes to rev and lacks the torque/power down low, true duals will further kill the power down low.
what he said, kills what little torque the 4.8 has down low