Tell ya the truth I just got to try the flowmasters out on I-75 today and they were very good (some mild interior noise but not unbearable)
Im not sure if it will clean primer, but hell, its worth a shot!
Thanks,
Abe
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**Officially not stock anymore!!*
1990 Mustang GT Convertible, Blue with Grey ground effects and white top. Black Leather interior pw,pl,ps,pm, premium sound system and flowmaster mufflers.
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