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Ships within 48 hours · Estimated delivery Oct 4 - Oct 9
00mm stroke with an 18mm steel piston pin
For GMC Sierra 1500 4
For 2017 GMC Sierra 1500 5
lasting seal
For Chevrolet Avalanche 1500 2002-2006
1999-2004 Chevrolet Silverado 2500 Driver Side Exhaust Manifold Kit 674-522 Y2204 00mm stroke with an 18mmProduct 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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