I used Howell Racing mufflers as they make a great performance muflfer that is 4 inch round outside and 3 1/2 inches inside and the right length for a Cobra. Now if you like them a bit louder like me, turn them around backwards. Running a all aluminum 496 FE 681HP and it sounds and runs great........
Thanks for your input Gary, but what i am looking for is dual purpose muffler. The engine should dyno over 700hp now , so i need at least a 3" perforated core on track days and play days. Driving around neighborhood i need to lower the decibels.
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Hybrid Mode
