01roushnj

for the record i have a 01 roush stage 2. ok so about a month ago my driver side muffler was torn off by a manhole and ruind so I purchased a new side exhaust kit from Roush for both sides because you cant have one new muffler and one broken in one. So i got them installed about a week and a half ago and put roughly 700-800 miles on thme so far. Now my car used to be ridiculously loud and now it is a quiet little b*tch and its driving me crazy! Does anyone know how long it takes to break the damn things in or why they are no where near as loud as my old ones????

David_K

remove the mufflers and replace it with a 6" glasspack.

AtlanticBlue99

it takes about 3k-5k miles to break in mufflers. atleast that is what i noticed with my magnaflows

sickspeedgt

mine broke in after about a month