Do all flowmaster mufflers have that rapping sound on acceleration? I just fitted a 40 series, & a 50 series muffler, they both have the loud rap sound when the engine is revved. Only difference I could tell was the 50 series was quieter on low RPM's if I don't step on it much. Rev it up, & they both sound the same.
What other designs are out there? Not sure if I like they sound of these.
68RT
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68 GTO 4-spd Convertible
78 S/E Trans am L78, WS6 Auto
78 S/E Trans am W72, WS6 Auto
79 10th aniv W72 Trans am
80 Indy pace car Trans am
89 Trans am GTA
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