JBA 88-93 GM Truck 7.4L BBC w/A.I.R. 1-3/4in Primary Silver Ctd Cat4Ward Header

If you're looking to get more power and better efficiency out of your 1988-1993 Chevrolet C3500 with the 7.4L BBC engine and A.I.R. system, a set of JBA Cat4Ward headers is a solid upgrade. These headers replace the restrictive factory exhaust manifolds, allowing your engine to breathe much more freely. This improved exhaust flow translates directly into more horsepower and torque, especially in the RPM range where you do most of your driving, whether that's for daily commuting, towing heavy loads, or even some spirited driving.

JBA builds these headers from durable stainless steel tubing, which is known for its resistance to corrosion and ability to handle high temperatures. The primary tubes are 1-3/4 inches in diameter, and they feature JBA's proprietary Firecone collector design. This design is based on race-proven technology aimed at maximizing power and torque gains. The flanges are a stout 3/8 inch thick with oversized exhaust ports to ensure a good seal and smooth transition for the exhaust gases. They also include factory-style emission connections, making it easier to hook up your emissions equipment for a cleaner, more compliant exhaust system. The extra-thick collector domes add to the overall robust construction.

When you're installing these headers, you'll find they come with high-quality hardware to help ensure a professional, no-leak installation. This is a significant upgrade over stock manifolds, and you should expect a noticeable improvement in your truck's performance. Make sure to refer to the manufacturer's installation instructions for specific details on mounting and connecting all components.