Resonated Vs Non-Resonated Test Pipes – Which One Is Best?

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Car exhaust parts like test pipes are the great sections of your exhaust to improve the sound quality that you want. Particularly, there are two types of test pipes available. One is the resonated test pipe and the other is the non-resonated test pipe. The efficiency of both pipes is almost the same. In a real sense, they are separate only on the input or output diameter and in the internal structure. However, they have some other differences that might be considered before choosing test pipes. If you want to make your purchase reliable, read this comparison article between resonated test pipes VS non-resonated test pipes.

Resonated means “quieted” in the OEM stock while non-resonated means less quieting work done and slightly rowdy. Basically, resonated exhaust systems are made to eradicate exhaust abrade and balance the airflow. They provide a pretty safe sound than loud. On the other hand, non-resonated can provide ill sound that is harmful. They provide more than 30,000 RPM sounds. In a word, they are louder than their counterparts. In addition, resonated pipes are built as a direct OEM replacement and designed to be an inclusion to your cat-back exhaust system.

Resonated Vs Non-resonated Test Pipes In A Table

Crucial factorsResonated Non-resonated 
Made in They are hand-made and built in the USA.Handmade in Austria
Basic conceptIt has an add-on resonator chamber to lessen the sound in the exhaust systems.These are newly designed as typical straight pipes and will be helpful for your VQ motor to smooth out the exhaust flow.
Suitable forGenerally, test pipes or resonated pipes replace the catalytic converters in Nissan’s 350z.These test pipes are usually suitable for all g35 Nissan’s vehicles and 370z.
Best forThey can deliver deeper sound and enhance the exhaust tone to feel the smoothness.These will help you with the sound adjustment of your motor and smooth out the exhaust flow.
Construction materialsFully rust-proof and waterproof stainless steel construction with a sparkle finish that makes this long-lasting.100% High-polished stainless steel body and built to meet your expectations.
Performance With bolt-on design, stainless steel construction, and producing plenty of horsepowers, resonated pipes offer high-flow performance.The performance is nearly the same as a resonating pipe. 
Items weightNot more than 2.5 kg10 lbs
Off-road and on-road suitabilityThese pipes are perfect for off-road use.With bolt-on design, stainless steel construction, and producing plenty of horsepower, resonated pipes offer high-flow performance.
Replacement Direct OEM replacement and no need for any cutting or welding.Same as its counterpart.
Warranty 3-year warranty on all welds and craftsmanship.They can perform off-road conditions but are slightly duller than average.
Costs It costs slightly more than non-resonated items but is affordable considering its class.It can be purchased at an affordable price. 

Resonated vs. Non-resonated Test Pipes: Major Differences

These test pipes are used to eliminate most of the catalytic objects and are designed for off-road use only. However, they differ in terms of functioning, producing horsepower, internal design, diameter, price range, loud level, suitability, and other objects. Below is the discussion about them.


The resonated test pipes have a resonance chamber in their design. This resonance chamber assists in dampening the bitter sound and frequency from the exhaust note. These pipes are great in reducing raspiness occurring. On the contrary, its counterpart has a straight-through design and doesn’t have any resonance chamber. Without any resonance chamber, it is cheaper, and the design is nothing outstanding.


The resonated test pipes are upgradable and have premium exhaust parts. It can maximize the performance by eliminating catalytic converters. It can effectively increase low-end torque. It is built to remove exhaust rasp.

On the other hand, non-resonated test pipes can increase exhaust flow and increase the sound level. Plus, it can blend the exhaust sound and keep the internal parts cool.

Horsepower Productivity

Occasionally, test pipes help to extend vehicle performance and efficiency. Resonated version is able to maximize the horsepower effectively. With their straight-through design, it can sum up the maximum amount of horsepower and torque to your V6 engine car.

Interior Structure

In the internal space, they are different from one another. The resonated part is specialized to eliminate exhaust rasp sufficiently. But at the expense of a little bit of hindering airflow. In that case, the non-resonated part is more spacious to flow the air properly. However, if you want a more refined sound than the bitter loud, you can switch your mind to resonated pipes.


The real difference between them is the diameter configuration. They are the same for cats and mufflers. However, the input or output diameters are separate. You should choose a diameter that closely matches the diameter of your exhaust components. Here the resonated test pipes have better adjustable diameters than the non-resonated ones.

Loud Level

Non-resonated pipes or straight pipes create more noise than resonated. After installing straight pipes, your exhaust will be more than 40% to 50% louder than before. Overall, there will be a strong raspy noise around 3000 to 3500 RPM. In contrast, resonated test pipes produce less noise and there is a 90% chance that raspiness will be eradicated. There is also a different combination of exhaust reactions. So choose carefully.

Fit and Finish

In terms of attachment and fishing touch, the resonated model is ahead of straight pipes. Anyway, the resonated pipe has a glossy finish with a fully polished stainless steel body. Likewise, the other pipe also has a high-polished finish without mind-blowing knockoffs.

Price Range

The price range between them is not the same. Both are cost-effective exhaust parts in the market. Resonated pipes are slightly more expensive than their counterparts. The reason is that the straight-through design pipe is slightly richer than the other. Moreover, considering the quality, benefits, and other features, the price range is within the budget.

Resonated and Non-resonated Test Pipes: Similarities

When you look at their performance, body materials, placement, warranty issues, installation costs, and weights, you will see the similarities between them. Nevertheless, some remarkable similarities are defined here.


Both test pipes offer a limited warranty from the purchase date. They offer a 3-year limited warranty.


The most important thing is performance before owning something related to an automobile. However, in this regard, both deliver outstanding performance the performance ratio is the same.

Installation costs

Though it varies from shop to shop and garage to garage, the amount of cost is nearly the same. Also, if you are experienced enough, you can install them yourself. It might take 2.5 to 3 hours.


Both test pipes are engineered with the same stainless steel materials.  If materials and quality of construction are your first concern, you can choose any pipes between them.

Resonated Test Pipe Is Best for Performance

These pipes come with all the impeccable features and are capable of doing bulk work. They provide unconditional performance till the end. With 100% stainless steel material and perfect diameters, they’re considered long-lasting pipes. Further, they have ⅜” intense mild steel flanges. All flags are made with an obvious nickel plate that eliminates potential corrosion. Additionally, these pipes are developed for those who are looking to prolong their car’s performance. Moreover, resonated test pipes successfully augmented low-end torque. Also, after installing resonated test pipes, the overall volume will increase. The inlet and outlet sizes are 2.5” and 3.5” respectively. They are made in the USA.

Non-resonated Is Best for Extending the Flow Rate

The non-resonated test pipes provide high-quality performance without destroying power. It has a glossy finish. Moreover, it is best for increasing flow rate and exhaust flow. However, it has some weaknesses when compared with straight-through design test pipes. It is affordable and has viable construction. It also has some exceptional features that are already mentioned in the main body. So you can’t throw it in the garbage. 

Benefits and Limitations of Resonated Test Pipes


  • Perfectly eliminate the exhaust rasp.
  • Provide more refined, deeper, and clean sound.
  • It enhances the exhaust tone.
  • Construction materials resist rust and dust effectively.


  • The expense of a little hindering airflow.

Benefits and Limitations of Non-resonated Test Pipe


  • Superb [performance and structure.
  • Affordable and durable construction.


  • Produce some raspy, nasty, and bitter sounds.


Both resonated and non-resonated test pipes are demandable and highly appreciable components. Resonated pipes are the best for those who don’t like noise. In contrast, non-resonated pipes are the better option for those who love to hear staring loudly. It’s pretty loud but it sounds really good. However, the differences between resonated vs. non-resonated test pipes help you to distinguish them easily. Furthermore, it helps you to choose the test pipes. This article highlights all the notable features of these two, which will help you to choose the right test pipe.

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