JBA 99-01 GM Truck 4.8L/5.3L LS w/o A.I.R. w/EGR 1-5/8in Primary Raw 409SS Cat4Ward Header

If you're looking to get more out of your 1999-2001 GM truck with a 4.8L or 5.3L LS engine, especially if you're doing some towing or just want a bit more responsiveness, these JBA Cat4Ward headers are a solid upgrade over the stock exhaust manifolds. They're designed to be less restrictive, which helps your engine breathe better and can lead to improved power and efficiency.

These headers are built from 409 stainless steel, which is known for its durability and resistance to corrosion, making them a good choice for daily driving, towing, or even more spirited use. The primary tubes are 1-5/8 inches, and they feature JBA's proprietary Firecone collector design. This design is based on race-proven technology and aims to maximize power and torque gains in the RPM range you'll use most often. The flanges are a stout 3/8 inch thick with oversized exhaust ports to ensure a good seal and smooth flow. They also include factory-style emission connections, so you can retain your emissions equipment, and come with high-quality hardware to help ensure a professional, leak-free installation.

This header set fits a range of GM trucks and SUVs from that era, including models like the Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, and GMC Yukon. They are designed as a direct fit replacement for the stock manifolds, simplifying the installation process. You'll want to refer to the manufacturer's installation instructions for specific details on mounting and any other necessary components.