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Megan Racing Cat Back Exhaust

Cat-Back Exhausts

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Axle-Back Exhausts

Megan Racing Exhaust Midpipes

Exhaust Mid-pipes

Megan Racing Exhaust Accessories


Megan Racing Exhaust Down-pipe

Exhaust Down-pipe

Megan Racing Exhaust Test Pipes


Megan Racing Turbo Manifolds


Exhaust Turbo-Outlets


Universal Mufflers

 Universal Mufflers

Megan Racing Exhaust Headers

*SOLDOUT* Exhaust Headers

Megan Racing Exhaust: Sound, Style, Performance

First impression is vital. We all know that. So we naturally emphasize those things that others first sense about us so that we make the impression we want. Grooming, dress, word choice. What people see and hear from us goes a long way.

What we drive makes an impression as well. How it sounds, how it looks, how it performs--they are all critically evaluated in an attempt to understand the driver. What does your vehicle say about you? The decision you face is about the Sound, Style, and Performance of your ride. Choose Megan Racing Exhaust.

Exhaust System Terminology and Definitions

It's pretty unfair to assume that everyone knows the terms and key components involved in exhaust systems. In fact, different vehicles use different exhaust components. Ultimately, the goals are the same:

  • To create a Sound that satisfies the operator
  • To give a visually pleasing Style that compliments the vehicle, and
  • To maximize exhaust removal from the engine in a way that improves Performance.

Let's review these components as they are usually encountered from the front to the rear of the vehicle

Manifold / Header

Our friends in the UK call this an extractor, and that's probably an even better name. This is the exhaust component that bolts directly to the engine and accepts the initial exhaust gas charge. Typically when someone says, "manifold", they mean a cast-iron, "log style" apparatus that has little performance value. Log style refers to the typical shape of the OE exhaust manifold, which looks like a log with a short, nearly 90-degree branch for each cylinder. However, there have been some cast-iron exhaust manifolds which resemble the tubular headers to which we'll refer next. Further, some companies use the word manifold to describe a tubular header, particularly when they're talking about one that is designed to have a turbocharge mounted on it. All of Megan Racing's Turbo Manifolds are built out of mandrel-bent stainless steel, not cast iron.

When someone refers to a header, however, you can almost always be sure that they mean a tubular header and not a cast-iron manifold. Headers have been made out of a number of materials, including mild steel and stainless steel. Mild steel headers are typically painted or plated to prevent rusting, but headers made of stainless steel require no plating. All of Megan Racing's Headers are 100% T-304 stainless steel. Headers can also be engineered in several styles. Headers for 4 cylinder engines come in 4-into-1 (4-1) and 4-into-2-into-1 (4-2-1) styles. The two different styles have different performance characteristics. Megan Racing engineers select either 4-1 or 4-2-1 to maximize the performance characteristics of the engine in question. Further, 4-2-1 headers are available in 2-piece (where they bolt together at the 4-pipe to 2-pipe intersection) or 1-piece. This decision is generally based on the engine position and layout, and what is most convenient in that particular engine compartment.

Turbo Outlet

As we said earlier, some exhaust components are used on some types of vehicles that are not used on others. The Turbo outlet is a key exhaust component that is only used on turbocharged vehicles. These are necessary to allow an efficient transition of exhaust gasses from the turbocharger outlet to the downpipe. Without this outlet, exhaust pulses would tend to "bunch up", creating backpressure on the turbocharger exhaust fan an significantly limiting boost.


The downpipe accepts the exahust gasses from the header (on naturally aspirated cars) or turbo outlet (on turbocharged cars) and carries it to the next phase of the exhaust (usually a catalytic converter or test pipe.) Also known as a midpipe, we tend to not use that term as it gets confused with what Megan Racing refers to as a mid-section pipe, which we'll discuss below. Downpipe is a term traditionally used in turbocharged vehicles but on this site we'll use it to refer to all vehicles covered.

Catalytic Converter / Test Pipe

The catalytic converter (or cat) is generally located immediately after the downpipe, and roughly in the middle of the underside of the vehicle. The cat is designed to convert the bad things that come out of an engine's exhaust (nitrogen oxide, carbon monoxide, and unburnt hydrocarbons) to the less-bad combinaton of nitrogen, oxygen, carbon dioxide, and water. For that reason, catalytic converters are a very good thing. However, they have gotten a bad rap among racers who are unwilling to compromise at all in their quest for performance. To further complicate matters, the US Federal Government imposes a staggering fine for replacing a working catalytic converter. Megan Racing makes two different high-flow, universal-style catalytic converters, but you must ensure that the shop that installs this confirms and documents that your existing catalytic converter is dysfunctional before replacing it.

Test pipes are short sections of pipe that is used to temporarily replace the catalytic converter for troubleshooting purposes. Additionally, some off-road race sanctioning bodies authorize vehicles to be run without a catalytic converter. The Megan Racing Test Pipes allow you to have a direct-fit replacement for the stock catalytic converter where the use of a test pipe is legal and appropriate.

Cat Back Exhaust

As the name implies the cat back exhaust (also called a cat-back exhaust or catback exhaust) replaces everything from the outlet of the catalytic converter all the way to the final exhaust outlet, or tip. The cat back exhaust includes a muffler, an exhaust tip, and piping to reach from the catalytic converter to wherever the exhaust exits the vehicle. That exit is typically at the very rear of the vehicle but can be located at the side (common in the case of pickup trucks.) The cat back exhaust also includes hangers necessary to mount the exhaust in the existing pickup points. While most original cat back exhausts are one piece, many of the Megan Racing Cat Back Exhausts are 2 or even 3 pieces. This makes installation far easier, as it is sometimes nearly impossible to snake the original 1-piece exhaust out around the rear axle without cutting it. This is less of a problem as there are fewer rear wheel drive cars.

Axle Back Exhaust and Mid Section Pipes

Some vehicles come from the factory with an exhaust that has a flanged, bolted connection at or just behind the rear wheels. This exhaust is called an axle back exhaust. Connecting the axle back exhaust to the outlet of the catalytic converter is a mid section pipe. We offer both Megan Racing Axle Back Exhausts and Megan Racing Mid Section Pipe Kits. It is noteworthy that either of these can be used to replace the stock components individually. This is an indication of the quality of the design, because the intersection has to precisely match the location and specification of the stock exhaust. However, in most cases, Megan Racing offers both an axle back exhaust and a mid secton pipe kit for any given vehicle. If that possiblity exists, it is highly recommended that you replace both components rather than retain the restrictive OE components.


Resonators are devices located in the path of various exhaust components (typically downpipes, cat back exhausts, and mid-section pipe kits) to control sound before the actual muffler. Megan Racing includes resonators where required to properly shape the sound without limiting exhaust flow.

Universal Mufflers

Megan Racing also sells their muffler cannisters "ala carte", or, without any other exhaust components. That is because there are some great cars out there for which no complete, bolt-on exhaust is available. In order that these owners aren't forced to do without the great sound, styling, and performance of a Megan Racing exhaust, they can purchase the mufflers separately and have a qualified technician use them to build a custom exhaust for their vehicle.

Megan Racing Exhaust--Sound, Style, Performance