Test Pipes
From Nissan 350Z & 370Z Wiki
A short piece of exhaust pipe that's designed to replace a catalytic converter in an exhaust system - supposedly while you test the results of the switch. Test pipes are illegal and you can be fined if you're caught with them on your vehicle.
So. Test pipes are basically straight pipes that replace your Catalytic Converters. They come in two versions - non-resonated and resonated. The non-resonated test pipe is the straight pipe. The resonated version is .. well .. resonated. Resonators are basically reflection type mufflers. They reduce harshness and volume of the exhaust sound prior to the conventional muffler. Peering into my set of Resonated Test Pipes I'm of the mind that I am looking at what I would once have called a 'glass-pack'
These pipes completely remove your factory catalytic converters and replace them with a straight through design. This provides the absolute most flow possible which has shown gains on NA 350zs between 4-10HP making it one of the best "bang for the buck" mods. These pipes are an absolute must on FI cars which need all the flow possible. Several variations are available for a wide price range.
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Resonated
Some of the Nissan 350Z test pipes come with resonators in place. These are basically straight through mufflers on the test pipe designed to minimize or completely remove the "raspy" sound that regular test pipes sometimes have. Depending on the particular exhaust combination, these resonated test pipes may or may not remove the raspiness that some 350Z owners hate and others love.
Kinetix Resonated
Found For: $ Diameter: 2.25" connects, 4" body Material: stainless steel Manufacturer: Kinetix
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Labree Resonated
Found For: $ Diameter: 2.5" Material: stainless steel Manufacturer: Labree
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Megan Racing Resonated
Found For: $149 Diameter: 2.25" Material: stainless steel Manufacturer: Megan Racing
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Non-Resonated
There are quite a few regular (non-resonated) test pipes to choose from for your Nissan 350Z. There are small differences that should be noted when choosing for your particular application. Pipe diameters range from 2.25-2.5 inches. Various materials are used such as steel, stainless steel, and titanium. The titanium will save the most weight, but is only a few pounds lighter than the steel variants. Any test pipe you choose will be much lighter than the heavy stock catalytic converters that the 350Z comes with. As much as 40lbs may be saved using the Titanium pipes.
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Categories: Altered Atmosphere | APS | B&B | Esprit | Helix | Kinetix | Mines | Ultimate Racing | Stillen | Invidia | Titek | Unlimited Tuning | Labree | Megan Racing | Parts | Exhaust