Here is what's posted from our web site, www.z28camaro.com
. We recommend non fuctional for all systems.
We can build your NOS smog system either functional or non-functional. There is no extra charge doing it either way. There are several advantages letting us build your system non-functional and we'll explain why:
#1. Gutting the smog pump and building it non-functional is the better way to go because there are no back firing issues when letting off the gas. Any time you let off the gas while driving your car you will experience back firing and popping. This was due to the smog pump and diverter valve pushing air through the system. There are documented cases of this backing firing destroying the exhaust system muffler. When gutting the drum in the pump assembly, your system will run quietly and look like it's functioning fine.
#2. Smog tube plating, as we know, original smog tubes were plated in a black zinc finish. When running a functioning system, the 1200 degree exhaust temperatures exit through the tubes. Within a years time, the heat will take it's toll on the black zinc plating destroying most of the factory finish. If we build the system non-functional, the tubes are plugged not allowing exhaust flow into the tubes preserving the plated finish.
#3. Exhaust flow, by letting us build your system non-functional, the exhaust port tube extensions are not needed. This will allow the exhaust to exit the cylinder head port without flow disruption increasing the horsepower in your engine.
So as you can see, there are several advantages to letting us build your system non-functional. All systems on our own personal cars are non-functional too. And remember, Camaro Hi-Performance is your best choice for that NOS smog system you need for that Z/28, 327, 350, 396 or 454!