Undoubtedly, the Shorty manifolds set up much more easily than a long pipe head configuration would have done. Aside from the differences, JBA Shorty and Long Tube Header are equipped with JBA`s patented Firecone manifold, which makes it easy to transition between volume changes in the manifold and maintains maximum escape speed, resulting in a noticeable increase in performance and efficiency that you won`t find on other manifolds. I think most of us would agree that a white Chevrolet/GMC pickup truck driving on the highway is not something very exciting. The reality is that these microphones are a dozen. Knowing that a white pickup truck is almost invisible, we decided to add a little more sex appeal to our GMC Sierra. We started by adding an emissions ProCharger that increased the truck`s power from 260 horsepower and 281 lb-ft to a healthier 419 horsepower and 422 lb-ft of torque. And while we`re happy with the newly realized profits, we can`t help but think that the plant`s exhaust system could be an obstacle. So our next step was to find an exhaust that sounds good, hoping to free a few more ponies. However, we wanted to update the exhaust to keep it legal in California.
Silent: The smog test does not test the silencer. However, we do not recommend taking the vehicle to test if your vehicle`s muffler is broken or has holes due to damage or rust. This can make it difficult for the smog technician to convince the smog machine to agree to test your vehicle. If the performance enhancement component you want to add or install in your vehicle, whether it`s a compressor, turbo, air intake, manifold, etc., is not listed on CARB`s website, it is not intended for legal use in California, except for off-road use only under certain circumstances. And this can lead to the failure of your vehicle`s smog inspection. With an elevator and the right tools, we installed all JBA components, shorty manifolds, new wires and rear exhaust in less than five hours. When we started the GMC, we were pleasantly surprised to find that the exhaust was noticeably noisier during cold starts. Overall, the exhaust is more audible at idle and with the throttle wide open. The good news was that the exhaust didn`t roar or make noise at the partial throttle, a common complaint of many aftermarket exhaust systems. We liked what we heard about the JBA setup. The next step was to put it to the test and see how much extra power we gained. Once the JBA shorty manifolds were tightened and our new PerTronix/JBA connection wires fit perfectly, we went to the back of the exhaust.
As the standard exhaust was simply too quiet for our taste, we opted for JBA`s Performance exhaust system (PN 40-3051), which should replace the exhaust south of the catalytic converter. Again, leaving the serial catalyst alone and stored is key to CARB compliance. What you need to have: Engine performance enhancement components such as upgrade ECU, turbo units, exhaust manifolds, intake manifolds, and other emissions-related components can cause smog control issues, but if there is evidence that the upgrade units are legal for use in California (they have an EO number) or are OEM parts, They will not cause a vehicle to fail California smog tests. These shorty JBA Performance Exhaust collectors are provided by the Executive Order (EO) of the California Air Resources Board (CARB), with one exception. According to the application manual and manufacturer`s installation instructions, they are 50 legal states when installed on the appropriate vehicle. We started our adventure in the shop with the JBA Shorty Headers. The passenger side was simple. We detached the standard exhaust manifold from the exhaust Y-pipe (three screws on the flange) and then detached the manifold from the head. The JBA piece came in like butter, and we used their graphite seals to prevent annoying exhaust leaks.
After lowering a few screws, we ended up on the right side of the truck. On the driver`s side, it wasn`t that easy. We had to loosen the steering shaft for easy access. It was clear that the installation on the driver`s side would take a little longer than the header on the passenger side. And since our GMC Sierra already had a driver-side mounted compressor, access was a bit narrow, but didn`t make it impossible. Don Lindfors, Director of Exhaust Gas R&D, PerTronix, Inc., said, “It doesn`t surprise me that your installation was easy. We design JBA collectors and manufacture them with the right tolerances to fit them perfectly. We decided to test our results with a VP Racing octanium fuel additive in the tank, new PerTronix spark plug wires and a new legal CARB exhaust from JBA Performance Exhaust. Good news: the power was high! You must present this number at the smog station where your vehicle will receive a smog check to pass the visual portion of the smog inspection. JBA understands the importance of combining performance with today`s mandatory emissions regulations. JBA works closely with C.A.R.B. to obtain order numbers for new vehicles to offer the industry`s newest line of emissions header products.
We are committed to our customers and the environment. OEM parts installation often protects a vehicle`s warranty and ensures that your vehicle does not pass the smog test for an exhaust system tampering error. The use of OEM parts is always recommended. 1978-1987 El Camino is home to transport the hay to the barn or take home the winning gear from the local drag track! The El Camino store offers this fantastic, Header, Smog Legal, V8, Hedman Hedders, Uncoated, for upgrading your performance exhaust system.
