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Vechiles built Jan 05 2004 t0 July 25 2004 with stock exhaust
4" PRXB DirectMount Exhaust Brake, Transmission Controller, Air Tank/Hose and Accessory Kit
In order to have consistent and effective braking over the entire RPM range, it is important (and necessary) to maintain constant backpressure. To achieve this, Pacbrake’s patented design has incorporated an additional waste gate on the butterfly valve to regulate the amount of exhaust flow that is being passed through. The flow is controlled by a spring-loaded arm, whose pressure rating and location are key factors in the functionality of the PRXB. Located outside of the housing and away from the heat, the spring is able to maintain its strength and durability for years of proper and precise braking performance.
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