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Nexus going with the X51 headers is not going to change the harmonics of the OEM cans. You need to switch out the mufflers. When I did my exhaust I did the AWE cans first then the X51 headers and harmonics barely changed.
Dave
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Current ride:
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2007 997S coupe SY, Blk sport seats, Nav, Bose and alum. door sills..that's it.
Mods: X51 headers, AWE Cats Borla mufflers...
X51 intake to come soon..
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