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The 3-inch Hooker Aero Chamber mufflers used on Project Olds feature a stepped acceleration chamber and a resonance chamber to maximize scavenging while minimizing exhaust drone. Their polished stainless steel finish adds a touch of bling. The 16-gauge steel U-bends and J-bends have radii of 6 and 4 inches, respectively. Hooker offers pre-bent tubing in a variety of angles and radii.