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Granatelli’s 4.0" manual dual exhaust cutout kit offers two slip‑fit aluminized mild steel valves with band clamps for large twin exhaust systems. Each manual unit provides independent control to open or close exhaust paths, letting drivers switch between stock and open exhaust tones mechanically. Sized for 4.0" (102mm) piping, the set installs using the included clamps for a durable, non‑electrical solution.
Granatelli 4.0in Aluminized Mild Steel Manual Dual Exhaust Cutout w/Slip Fit & Band Clamps
