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more aggressive exhaust tone
Actual Displacement: 434cc
Sport) 1997-1999
Coolant temperatures run cooler
2 * 1 / 4 '- 20 nut
2000-2006 GMC Yukon XL 5.3L Manifold Headers yy2303FPL more aggressive exhaust toneProduct Overview: 1. Exhaust headers are a key upgrade for boosting engine performance by improving airflow. Unlike restrictive factory exhaust manifolds, performance headers give each cylinder its own dedicated exhaust path, reducing back pressure and improving exhaust flow. 2. By minimizing exhaust interference between cylinders, headers help increase horsepower and torque. When paired with a high performance cold air intake and a cat back exhaust
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