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 IN STOCK NXD12003The NXD Stacker Systems are guaranteed to boost horsepower, torque, erase that ugly black smoke cloud and dramatically reduce exhaust temperatures. The NXD STACKER is the ultimate safe, low cost add-on for your modified diesel truck. Hold on because the Next Generation Stacker nitrous systems are he... Nitrous Express NXD Super Stacker Nitrous Kit w/Lightning 375 Solenoid 2007-2014 GMC Sierra 3500 HD SLE / SLT / WT 2011-2014 GMC Sierra 3500 HD Denali $1,056.24 |