• For 2008-2013 Chevy/GMC trucks with 5.3L V8
• Shorty design for power gain from idle to mid-range RPM
• Gains 18HP and 20 lb-ft torque
• OE style ball socket collector connects to factory exhaust head pipe
• Mitered merge collectors to maximize exhaust velocity and scavenging
• Fully mandrel bent tubes made of 16-gauge, 409 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