When it comes to simple mods that can increase not only your gas mileage but a lso the performance of your ride, a header and exhaust combo is the big one for the largest immediate gains. JBA is the leader in full exhaust systems for all types of vehicles and makes a great set of headers and exhaust system for the Chevy Blazer 4.3L V-6. With the ever-increasing hike in gas prices, it was definitely a well-needed modification.
We headed to the pros at JBA to check out their header/exhaust combo at work. With the headers, exhaust, and an AEM intake, we received an increase of 22 hp and 26lb-ft of torque at the rear wheels over the stock versions. Follow along, and check out just how easy it was to get these gains. For more information, contact the companies listed in the source box.
1. The JBA headers and exhaust are coated for great looks and long-lasting durability. Here's a good look at both. | 
2. To begin the installation, the Blazer was put on the lift and the front wheels were removed for easy access to the stock manifolds. | 
3. The stock exhaust was easily unbolted from the factory manifolds. Here, you can see what an eyesore the rusty stock manifolds were. |
4. The driver side was a little tighter fit because of the steering. But after the plugs and stock exhaust manifold were removed, the rest was just as easy as the passenger side. | 
5. Next, both the heat-shield covers and the stock manifolds were unbolted. | 
6. With the stock manifolds out of the way, the surface was cleaned and prepped for the new gaskets. |
7. Here's a great look at the improved flow and much better aesthetics of the JBA headers, as compared to the stock manifolds. | 
8. With the stock manifolds out of the way, the surface was cleaned and prepped for the new gaskets. | 
9. Here's a great look at the improved flow and much better aesthetics of the JBA headers, as compared to the stock manifolds. |