FRPP Touring Break-in

[embraceentropy]

I had the FRPP Touring catback installed last week (don't judge...I work a lot).

Will these mufflers break-in and possibly become less raspy? When I have the windows down I can hear the popping echoing off buildings. Also, when in 4th gear around 3,000RPM there is a high pitched resonance.

I have never put aftermarket exhaust like this on an OHC engine, so I'm a little sensitive to the rasp and resonance but I hope it will calm down a notch...

Experiences?

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[Screwdgie]

Mine seemed to smooth out after a few weeks. Did seem a bit raspy at first, especially before it was warmed up. Got to listen to it on the dyno the other day, the first time I've heard it from outside the car and I absolutely love it

 

[Stang16]

Mine mellowed out considerably after 400 miles.

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