Do I need an ECU tune for my exhaust mods?

This can vary from car to car and product to product. Modern ECU’s are incredibly advanced and make the necessary adjustments automatically for proper drivability. As a rule of thumb, none of our catback exhaust systems require an ECU tune, and none of our exhaust products that include our HJS 200 cell catalytic converters require…read more

Will exhaust mods void my warranty?

There is no yes and no answer to this question. There are dealerships that will not touch or support anything that doesn’t have an OEM part number on it. There are dealerships that purchase, sell, and install all manner of aftermarket products (including SOUL exhaust systems) and even have their own dedicated performance departments. What…read more

What is PVD coating and why do you use it for your tips?

Physical vapor deposition is the process of vaporizing metal in a high vacuum environment and depositing it on electrically conductive materials yielding a microns thick finish with a very durable bond. PVD coatings vary in their function and properties as well, from coefficient of friction to hardness. Cutting tools benefit from abrasion resistance and cutting…read more

What does it mean that some of your components are made in an ISO 9001 certified facility?

Sometimes it makes sense to externally source the best possible solution for an individual component that we need for manufacturing. ISO certification is reflected in the quality of the individual components. More specifically, this means we ensure mandrel bent pipes and flanges are produced to the strictest tolerances with highly calibrated machines by highly trained…read more

What is the finish on your exhausts?

We’re often asked – what exactly is the finish on your exhausts? Is it a coating? Why not just polish? Isn’t that just sand blasting? Definitely not! SOUL uses a proprietary blend of premium blasting media that was specifically arrived on after much testing to get the look that you see on our systems today.…read more

What’s the best way to clean my exhaust?

We highly recommend rinsing your exhaust with water every time you wash your car to remove contaminants, road grime, and salt. Salt is very corrosive and can cause surface rust if left on your exhaust, suspension, and other components. If you’re going through an automatic car wash, definitely consider an option that washes your undercarriage!…read more

How does a valve controller work?

Our valve controller kits need a 12v source of power and a ground wired up to the control unit to operate. A third wire coming off of the control unit acts as the antenna. An included cable runs from the control unit to a solenoid to supply a signal. When the key fob is pressed,…read more

Why don’t you have decibel readings for your products?

Short of measuring in a soundproofed, climate controlled environment it is impossible to have a standardized dB reading for vehicles – but even then the results would vary in the real world. There are many conditions which affect sound: distance, measuring angle, weather, sensitivity of the testing device, other sources emitting noise, and even reflection…read more

Why do you use HJS catalytic converters?

We use HJS catalytic converters due to their long standing reputation for quality, performance, and durability. They achieve the mark of preventing check engine lights and reducing noxious fumes while increasing flow. Have over 30 years of experience producing catalytic converters for aftermarket and OEM applications Use high quality foil winding designs and premium wash…read more

What does it mean to back purge a weld and why does it matter to me?

Ensuring proper penetration and proper welding is crucial to ensure the longevity of exhaust components that are welded together. Purging the metal of oxygen with an inert shielding gas can keep the weld fully protected from oxidation that could lead to corrosion. The formation of oxides usually results in black “sugaring” on the back side…read more

Are your parts legal in California?

Replacing your tips is a safe bet – anything else can get complicated. “The sale and installation of an aftermarket exhaust system remains legal in California so long as it does not exceed a sound level of 95-decibels when tested under SAE J1492 and complies with all other exhaust and safety laws and regulations. Now,…read more

Will my dealership install your parts?

When in doubt, ask your dealership! We have some dealerships that will sell and install our parts. Some will not. Every dealership is different and we encourage you not to leave it up to chance or someone’s opinion –  speak to your dealership(s) before proceeding with any modifications if you are still under warranty.…read more

What is a “Jet-Hot ceramic coating” and why do you use it?

We’re proud to be partnered with a top quality ceramic coater – Jet-Hot High Performance Coatings! We ceramic coat several of our exhaust components as it results in a better product for you – and you have the option of custom coatings any time you desire! Let’s dive in to what ceramic coating is and…read more

What is a helmholtz resonator and how do they work?

Helmholtz resonators (also known as anti-drone tubes) are an effective way to reduce undesirable frequencies at a targeted point in the RPM range when engineered and utilized correctly. Through calculations on factors such as number of cylinders, target RPM, and other factors you can determine the appropriate volume necessary to create the Helmholtz resonator. These…read more

How much do HJS cats flow compared to a straight pipe?

Show us the data! Without flow data it’s impossible to make a valid claim. As always we suggest looking at all claims critically and not taking any percentage claims without solid evidence as proof of performance. HJS cats DO offer industry leading flow without triggering a check engine light due to the high amount of…read more