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Holley Systemax Intake: 395 hp at 6,200 rpm, 380 lb-ft at 5,000 rpm
While we had previously replaced the factory H.O. intake with the performance-oriented GT-40, we suspected the GT-40 was now limiting our combination. Leafing through the list of available upper and lower intakes for the 5.0L, we selected the Holley SysteMax combo. Though impressive in as-cast trim, we sent ours out to the good folks at Extrude Hone in Paramount, California, for some magic putty porting. The results were impressive, as the ported SysteMax intake and matching 75mm Holley throttle body improved the power output of the 302 combination dramatically. Where the previous combo with the GT-40 intake produced 354 hp and 378 lb-ft, the Holley manifold upped the peak numbers to 394 hp and 380 lb-ft of torque. The majority of the power gains came past 4,700 rpm, as the GT-40 offered more torque below that point.