The K&N 71-1532 is a Blackhawk Induction cold air intake for the 5.9L L6 Cummins diesel in Ram 2500 and 3500 trucks. It replaces the factory air filter and intake tube, and the manufacturer pairs a powder-coated aluminum tube with a dry synthetic filter. The manufacturer lists an estimated gain of 8.09 HP @ 2400 RPM, and its own testing on a 2500 5.9L turbo diesel reported an estimated 8.09 HP and 14.27 lb-ft of torque. Treat both as estimates, since real results depend on the truck and tune. Against a stock airbox or a basic filter swap, this kit trades a restrictive factory path for a full aluminum tube and a lifetime limited warranty from the manufacturer.
Because the filter is oil-free, there is no oiling step, and the manufacturer says the filter only requires cleaning every 50,000 miles under normal highway driving conditions. Replacement filters use part number RU-5171HBK. Fitment years need checking before you order. The manufacturer's product title reads 03-06, while its application listings include a 2007 Ram 2500 5.9L and its own blog covers 2003-2007 Dodge Ram 2500 & 3500 5.9L Cummins trucks. Confirm your model year with the manufacturer. Enthusiasts searching for a 71-1532 Blackhawk, a 5.9 Cummins dry filter intake, or an oil-free 2003-2007 Ram 2500 cold air intake will find this kit fits that search.
The manufacturer's product title lists 2003-2006, while its application listings also show a 2007 Ram 2500 5.9L and its blog covers 2003-2007 Ram 2500 and 3500 trucks. Confirm your exact model year and engine with the manufacturer before ordering.
According to the manufacturer, 2003-2007 5.9L owners can choose between a roto-molded HDPE intake (57-1532) and the Blackhawk 71-1532, which uses the aluminum tube design.
The manufacturer says the filter needs cleaning every 50,000 miles under normal highway driving, and the filter media is oil-free synthetic, so no oil is required.
The manufacturer states the system typically installs in 90 minutes or less using simple hand tools, and it replaces the factory filter and intake tube, so the job centers on removing the stock airbox and tube and mounting the aluminum tube with the included stainless clamps. Check fit around the turbo inlet and mounting points before final tightening. Keep the vehicle's engine-bay wiring and sensors clear during install, and confirm your model year with the manufacturer first, since fitment years vary across manufacturer materials.
