JBA 91-99 Jeep 4.0L 1-1/2in Primary Raw 409SS Cat4Ward Header

JBA is known for making exhaust upgrades that really wake up an engine, and these Cat4Ward headers are a prime example for your 1991-1999 Jeep Cherokee or Wrangler. If you're looking to get more power and better efficiency out of your 4.0L engine, swapping out the restrictive stock exhaust manifold for a well-built header is a smart move. These headers are designed to flow much better than the factory part, which can make a noticeable difference in how your Jeep performs, especially when you need it most, like when towing or just driving around town.

What sets these JBA headers apart is the attention to detail in their construction. They're made from 409 stainless steel tubing, which is a solid choice for resisting corrosion and handling the heat cycles your exhaust system goes through. The flanges are a beefy 3/8-inch thick and machined for a flat surface, ensuring a good seal. You'll also find oversized exhaust ports to help with flow, and JBA's unique Firecone collector design, which they say is proven on the race track to help build power and torque right where you need it for daily driving and other uses. They even include factory-style emission connections so you can hook up your stock sensors, and all the necessary hardware for a clean, no-leak installation.

When you're installing headers, getting a good seal is key to performance and avoiding exhaust leaks. JBA includes high-quality hardware to help with that. This is a significant upgrade over the stock manifold, and you should expect improved throttle response and a bit more grunt from your 4.0L engine.