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The seal is used before and after the bellows - it is necessary to order 2 pieces.

RPM Performance Hyundai I30N & I20N upgraded exhaust spring
The Hyundai I30N and I20N exhaust system is equipped with a very weak exhaust spring, which weakens over time and causes the dreaded rattling sound. To solve this problem, Hyundai requires you to replace the entire rear box and not sell this spring upgraded separately.
Our exhaust springs are made from premium material, and we have altered the spring rate so the spring does not weaken or crack due to heat.
Fits all Hyundai i20N, I30 N & I30 Fastback N & Veloster N
Suits standard OEM exhausts and our aftermarket exhaust system
Easy installation, remove the motor and replace the spring

Thanks to this “plug and play” external unit with remote control, you take control from the car's control unit and finally become the master of the valves in your exhaust system. It doesn't matter whether you have a stock exhaust system, a REMUS system, or another performance system. The exhaust valves are always controlled as standard via the on-board computer according to the set mode. The fundamental problem is that even if you set the highest sport mode via the on-board computer, it doesn't automatically mean that the valves will "listen" to you and open to 100%. It depends on the specific vehicle model (their control algorithm always differs), but it almost always applies that full opening only occurs with a warm engine, under load, and from certain RPMs! In other words, you only get the best sound from the exhaust in a narrow spectrum of car use. And that's a shame. Likewise, even in the lowest car mode, there is often a desire or need to enjoy the sound to the fullest. Only with our external unit can you fully open the valves in the exhaust at any time, or completely close them if necessary, or switch back to serial mode, and the fourth option is to open the valves to 50%. Installation is absolutely simple and can be done by any service centre, or a skilled owner can handle it at home even without tools. For most vehicles, this involves simply 'bridging' the wiring leading to the electric motor(s) that control the exhaust valves. For other vehicles, the principle of bridging the electrical circuit is implemented in a box under the dashboard, again in a 'plug and play' manner. The driver then controls the valves using a wireless controller in 4 modes, as described above. The controller is already paired with the control unit and no calibration or further settings are required. Everything is simply 'plug and play'. Given the absolutely essential benefit of improved sound (extracting the maximum from the exhaust system), purchasing this external control is simply an automatic investment.

Made from 304 stainless steel and professionally welded and hand made Tig in the United Kingdom!
Helmholtz
You may be asking what the small tube is on our Resonator Delete? The small tube is a Helmholtz resonator. In an exhaust system, the Helmholtz will be a container of gas (usually air) with an open hole (neck or port) leading into the resonator. The volume of air/gas in and near the open hole vibrates due to the 'elasticity' of the air/gas inside. A common example is an empty bottle: the air inside vibrates when you blow across the top!
What is Drone?
Drone is the point at which the exhaust sound resonates in the cabin, creating a noise that most drivers dislike, so the decibels and frequencies may vary slightly depending on the driver and the car. That's why we created Anti Drone Resonator Deletes. When removing a standard resonator, you are paying the difference between someone who wants to give you a pipe and throw it on the car, and a company that designed a product for a specific job, who took the time to research, develop and test to make the product the best it can be!
RPM PERFORMANCE Anti Drone Resonator Deletes have been designed to reduce the rate of resonance throughout the rev range, specifically the motorway speed on UK roads (70 mph). This is because if you are driving in a car for a short journey, then for most drivers a bit of sporty noise isn't bad, but if you are driving for a long time, then you don't want the vehicle to resonate in the cabin.

Introducing our NEWLY MANUFACTURED Hyundai I30N / VN / Kona N Flexi pipes, made from stainless steel, professionally TIG welded and hand made in Great Britain!
Why change the Flexi?
The standard OEM flexi is considered the most restrictive part of the exhaust system on the I30N, as the bore diameter narrows to approximately 50mm. The RPM PERFORMANCE Hyundai I30n Flexi is a true 76mm (3”), so you will see an increase of 8 to 12 horsepower compared to the standard flexi. This product will pair nicely with a GPF delete and make for a high flowing exhaust system.
What will it sound like?
Turbo engines need to be able to breathe. By removing the stock Flexi for the RPM PERFORMANCE Flexi, you effectively increase flow, so you will see a slight increase in power and a noticeable increase in sound, especially on overrun.
Will the engine management light (EML) come on?
No.
Fitment
Our Flexi pipes are a direct bolt-on replacement that requires no cutting or welding. All are supplied ready to fit with the correct bolts.

Introducing our NEWLY MANUFACTURED Hyundai I30N / VN / Kona N Flexi pipes, made from stainless steel, professionally TIG welded and hand made in Great Britain!
Why change the Flexi?
The standard OEM flexi is considered the most restrictive part of the exhaust system on the I30N, as the bore diameter narrows to approximately 50mm. The RPM PERFORMANCE Hyundai I30n Flexi is a true 76mm (3”), so you will see an increase of 8 to 12 horsepower compared to the standard flexi. This product will pair nicely with a GPF delete and make for a high flowing exhaust system.
What will it sound like?
Turbo engines need to be able to breathe. By removing the stock Flexi for the RPM PERFORMANCE Flexi, you effectively increase flow, so you will see a slight increase in power and a noticeable increase in sound, especially on overrun.
Will the engine management light (EML) come on?
No.
Fitment
Our Flexi pipes are a direct bolt-on replacement that requires no cutting or welding. All are supplied ready to fit with the correct bolts.

RPM PERFORMANCE Hyundai I30N GPF Delete:
Here at RPM Performance, we successfully manufacture Hyundai I30N GPF Deletes. It's not like a normal GPF Delete on the market.
Made from 304 grade stainless steel and professionally welded and hand made Tig in the United Kingdom!
Check out our video to hear what it sounds like. The video is below the description.
What is a GPF?
Gasoline Particulate Filters (GPF) are an emissions after-treatment technology based on Diesel Particulate Filters (DPF), developed to control particulate emissions from Gasoline Direct Injection (GDI) engines.
It is also the most restrictive part of the exhaust. Our GPF Deletes increase gas flow for maximum flow.
What will it sound like?
Turbo engines need to be able to breathe. By removing the stock GPF for the RPM PERFORMANCE GPF Delete, you effectively increase flow, so you should notice a slight increase in power and a significant increase in sound, especially when overruning.
Will the engine management light (EML) come on?
None.
Unlike many others, we have fitted an internal piece to control/switch the EML, which prevents it from turning on.

RPM PERFORMANCE Hyundai I30N GPF Delete & Flexi Pipe.
Made from 304 grade stainless steel and professionally welded and hand made Tig in the United Kingdom!
Check out our video to hear what they sound like:
https://youtu.be/WCtGz5yX9-E