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***FREE SHIPPING TO THE CONTIGUOUS US! **Contact us directly for a quote if shipping is needed elsewhere! Hallman PRO RX Silver Manual Boost Controller Hallman PRO RX Silver Manual Boost Controller. Hallman Pro RX Boost Controller: The Hallman Pro RX Boost Controller has a ceramic ball instead of the 316 stainless ball that comes in our other valves. The ceramic ball only weighs a fraction of what the stainless steel balls weighs. This weight difference allows the ceramic ball to act very quickl...

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