DSX – Auxiliary Fuel Pump Kit for 2010 – 2015 Camaro SS / ZL1 / Z28 / 1LE

The only exception that you MIGHT want to run the 8psi is if you own a ZL1 (or SS w/ ZL1 fuel pump and LSA blower). Even in this scenario, there is no downside to running the 2psi (except potentially pump life as it would run fewer times per drive).