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The Helmholtz chamber is a resonance cavity that reduces the drone that most high-performance exhausts have at light throttle cruise
While the aesthetics are the most recognizable change to the system what is more impressive is the functionality that lies beneath the carbon fiber lid
This piece removes the factory resonated section and replaces it with straight through 3
Muffler - ProXS - 2
or selling the unit a breeze
Tail Pipe Kit- 3in 68-72 GM A-Body Spring Kits The Helmholtz chamber is aExhaust Tailpipe 3 in Diameter Steel Aluminized GM A Body 1968 72 Pair
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