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Re: The $45 SHO Free Flow Exhaust Caution: Homemade Hey did you eliminate the waterbox and the resonator to do this modification. Is there any chance of water backing up and finding its way back into the engine.
Free Flow Exhaust Kits for the 911® 3.2 L models, improve sound and performance, while reducing backpressure and thermal load on the motor. These kits are based off the early style exhausts found on the 1974 2.7 L RS®.