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• For 04-08 F150 with 5.4L V8
• Shorty design for power gain from idle to mid-range RPM
• OE style ball socket collector connects to factory exhaust head pipe
• Fully mandrel bent tubes made of 16-gauge 304 stainless steel
• Head flanges laser-cut from 3/8-inch thick steel plates
• Flanges flattened by hydraulic press for precise and leak-free seal
• Flanges chrome plated for corrosion resistance
• All joints TIG welded for resistance against cracking and wearing
• Polished surface for extra protection against rusting
