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The Turbosmart 4.0-inch trumpet fitting is a direct replacement accessory for Big Bubba blow-off valves, designed to alter discharge sound and boost response characteristics. Finished in black, the trumpet installs in place of the original outlet to restore or change the venting profile on compatible Bubba BOVs. Sold as a single fitting for Bubba series valves.
Turbosmart BOV Bubba 4.0in Trumpet Fitting - Black
