BMS BMW/Supra Gen 1 B46 B48 Charge Pipe Blow-Off Valve (BOV) KitBMS BMW Supra Gen 1 B46 B48 Charge Pipe Blow Off Valve (BOV) Kit Finally, that blow off valve sound you've been waiting for on your Gen 1 B46 B48 2. 0L powered BMW Supra. The massive Turbosmart Raceport blow off valve lets unused charge air to vent to the atmosphere giving off the desired "Pshhhh" blow off sound all turbo owners love. The BMS Elite is the highest quality B46 B48 charge pipe upgrade on the market. Our charge pipe is constructed from
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