Thread: Roush 427r only made 400whp :(
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Old 02-28-2015, 03:24 PM
mikeinatlanta mikeinatlanta is offline
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If you want the power you will need to install a quality exhaust. I have yet to see a quality aftermarket cobra exhaust so I had one built. You also want to look at the air filter assy. Lots to lose there.
Last edited by mikeinatlanta; 02-28-2015 at 03:26 PM..
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