MITA Motorsports | NSX, S2000, Integra Specialists


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MITA NSX Exhaust

(4 reviews)
SKU: 18030-NMP-000


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Fabricated using high grade stainless steel to produce a unique low tone to compliment the NSX’s engine sound.

The NSX is a high-performance sports car and its owners often look for ways to enhance its performance even further. One of the most popular modifications is replacing the factory exhaust system with an aftermarket one. This upgrade offers a number of benefits including improved performance, enhanced sound, increased horsepower and torque, weight reduction, and better exhaust flow. The new exhaust system is designed to optimize the engine’s exhaust flow, resulting in more power and a more aggressive sound. The new system is also typically lighter, which can result in improved handling and acceleration. If you’re an NSX owner looking to take your driving experience to the next level, upgrading your exhaust system is a must-have modification.

This is our best NSX exhaust, and possibly one of the best NSX exhausts on the market.


  • Weight: 27lbs (12.247kg)
  • Piping diameter: 51mm (2 inches)
  • Exit Pipe diameter: 10.16mm (4 inches)
  • 304L Stainless steel
  • Designed in Tokyo, Japan

1. Material Used
All Steel have the same basic iron and carbon composition. However, stainless steel also contains chromium, the alloy that gives stainless steel its famous corrosion resistance. Remember, that stainless steel does not mean it is stain proof. It means it will “stain less.”

Stainless steel must contain at least 10.5% chromium. But there are other multiple grades under the stainless steel umbrella, each with slightly different alloy composition, and therefore slightly different physical characteristics.

Different Grades

The most commonly used Stainless steel grades are 200 series and the 300 series. The 200 series is a class of austenitic (highly corrosion-resistant) stainless steels that are characterized by having low nickel content. However this is not ideal when purchasing for a new exhaust system as the lower nickel and chromium content makes it less resistant to corrosion. 304 “food grade” stainless steel on the other hand, which is comprised 18% chromium and 8% nickel (nicknamed 18/8). 304 proves to be resistant to oxidation, corrosion, and durability. We use 304 food grade for our exhaust system. Why don’t all manufacturers use 304 then? Well, because these austenitic alloys are higher grade materials and harder to work with, they are therefore too expensive for the vehicle manufacturers to supply.

304 Grade

Not all 304 grade is considered the same. There is the standard 304 that we mentioned earlier and 304L grade, which to make explanation easier, is .03 max carbon and is good for welding whereas 304 has a mid range level of carbon. What does this mean then? The 304L plays a strong part in welding due to the .03 max carbon level. This means that the 304L variant was produced to overcome the risk of intercrystallite corrosion aka, weld decay, which was identified as a problem in early stages of the application of these steels. This can result if the steel is held in a temperature range 450 to 850°C for periods of several minutes, depending on the temperature and subsequently exposed to aggressive corrosive environments. Corrosion then takes place next to grain boundaries.

If the carbon level is below 0.03 then this intercrystallite corrosion does not take place following exposure to these temperatures, especially for the sort of times normally experienced in the heat affected zone of welds in thick sections of steel.

MITA NSX Exhaust uses 304L grade stainless steel.

How can you check your exhaust’s grade?

While there is no easy way to check, there is the Moly drop test you can perform. By dropping a electrolytic potassium thiocyanate solution then taking 9v battery to the drop area, you can check the steel used. If the solution gives off a red color but disappears after a few seconds, then the steel used is of 304; however, if the test drop area turns black, then the steel used is of 200 grade.

Of course it is hard to obtain a chemical spotting test kit as they are expensive; therefore, the best test is to see how your exhaust is handling corrosion as the years pass by. If the steel is of extremely high grade, it can easily be buffed by using steel wool and a polish compound; while also remaining extremely shiny as years pass by. MITA NSX Exhaust will be able to be buffed out by using steel wool and a polish compound to keep that new look even throughout the years.

2. Welding Methods
What? Okay, let’s try to simplify things. MIG welding is a very simple and easy process to learn compared to learning how to TIG weld. The technical names for these are Metal Inert Gas (MIG), and Tungsten Inert Gas (TIG).

MIG welding works by continuously feeding spool of welding wire that burns, melts and fuses both the base and parent metals together. A variety of materials such as lid steel, stainless steel and aluminum can be welded using MIG

TIG welding is a more complex method. Commonly used for thinner gauge materials. Items that are made with this process can be kitchen sinks and tool boxes. A strong benefit is that you can get your power down really low and not blow through the metal. TIG welding is a more fine and delicate welding technique.

Our Welding Process
We discussed TIG welding earlier and how it is a more delicate method. Though our method goes an extra step. For our exhaust system, we introduce 100% Argon to be flown throughout our exhaust to act as a shielding gas. Meaning that we feed gas into our exhaust system and weld it both on the exterior and interior of the 304L grade stainless steel. This allows for stronger welds than the traditional TIG welding.

How To Differentiate A Good Weld vs Bad Weld
The rule of thumb of welding is to check consistency. The welds need to be consisted and not all over the place and be extremely messy. Welds that show inconsistencies are considered bad welds. Our exhaust adds character by adding color to our welds to give a “flare” look but still structurally strong.

3. Dyno Performance

  • MITA Exhaust
  • OEM Exhaust
  • Mugen Exhaust
Red: MITA NSX ExhaustGreen: OEM NSX ExhaustGreen: Mugen (SACLAM) Exhaust

Red: MITA NSX Exhaust
Green: OEM NSX Exhaust
Blue: Mugen (SACLAM) Exhaust

Before we get into the numbers, I’d like to explain the NSX we used. Our tester NSX was a complete OEM NA1 NSX with original OEM headers, original OEM catalytic converters, and with 83,000 KM (51,000 miles). Tested on Dynojet 224x

We then tested each exhaust, MITA NSX Exhaust , then OEM , then the SACLAM Silencer Spec A

This is our results. We ran each exhaust twice for consecutive testing while only taking in the top Max Power.

  • MITA Exhaust ran 237 MAX.

  • OEM Exhaust ran 233 MAX

  • MUGEN (SACLAM) Exhaust ran 230 MAX.

4. Fitment
With our prototype product, we found an issue with installing the upper flange where it was difficult to install and bolt onto the catalytic converters with the exhaust mounted first; though after alternating it, the installation process then became easier in which you mount the exhaust first then bolt onto the catalytic converters.

Additional information

Weight11 kg
Dimensions130 × 80 × 30 cm

4 reviews for MITA NSX Exhaust

  1. Alejandro A

  2. Billy H

    Amazing customer service! And items always packed well and on time

  3. Brian A

    I was happy to replace my OEM catbacks with the MITA exhaust. The craftsmanship is stunning and the end result adds a lot to the driving experience. It’s not too loud in the cabin as I had initially feared, and it certainly wakes the exotic personality in the car I had mostly forgot was there. It is not raspy, and compliments the V6 well.

  4. Shaan S

    this is the best NSX exhaust on the market baritone yet always “with you” when you drive the car in a spirited manor. no drone and fantastic build quality, running full headers resonated test pipe to extract the most from the NSX

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Shipping Policy

We aim to process most orders within 24 hours, excluding weekends and holidays. Most orders are shipped within 14 business days, unless the part is on backorder or is a special order. If you need a part for a specific date, please contact our sales team to confirm the item’s availability and arrange for express shipping. Please note that we only ship to the verified billing address of a credit card and to the cardholder only. Most orders are shipped via standard air freight unless otherwise specified.

Refund Policy

We want you to be completely satisfied with your purchase. If you receive a defective item or an item that does not match the description, please contact our customer service team within five days of receiving the product. We will gladly accept returns of unused and unopened items within five days of the purchase date. Please note that a 20% restocking/cancellation fee applies to any MITA original product returns. All returns are subject to inspection, and we reserve the right to refuse any return or charge a restocking fee. We do not accept returns on OEM Honda/Acura products and any products from our aftermarket partners. No cancellations or returns are allowed on special order parts. We are not responsible for manufacturing delays, scheduling, or other issues related to manufacturing. We do not guarantee that a part will be delivered on or by personal deadlines.

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Refunds are subject to our payout schedule, which is on the last day of each month. International/Canadian customers are responsible for paying their own customs, duties, and brokerage fees. MITA LLC is not responsible for these fees. Nonpayment of fees will not constitute a return. If products are returned due to nonpayment of fees, the products will be forfeited to MITA LLC, or the customer can pay to have the items reshipped.

MITA LLC makes no warranties of merchantability, of fitness for a particular purpose, or that its products comply with laws, regulations, or ordinances in the states where they may be sold to the ultimate purchaser, the consumer. In this connection, the retail purchaser, the buyer, the ultimate consumer assumes the burden of the entire cost of any and all necessary service, alterations or repairs. MITA LLC advises the consumer or customer that all products purchased in the State of California must conform to specific vehicle code sections. Please consult local and state laws for more information.

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