Exhaust System Cost: What You Need to Know Before You Buy

Thinking about swapping your muffler or going full‑custom? Most people assume an exhaust upgrade is either cheap or outrageously pricey. The truth sits somewhere in the middle, and it depends on three things: the type of exhaust, the brand, and how you get it installed.

First, decide what you want from a new system. Are you after a deeper growl, a few extra horsepower, or simply better fuel efficiency? A basic cat‑back swap can give you a noticeable sound upgrade for a few hundred pounds, while a full‑header and free‑flow cat can push the price into the low‑thousands.

Budget vs. Premium: Breaking Down the Numbers

Budget kits usually start around £150‑£300. These are often made from thin stainless steel or aluminized steel and are designed for a modest sound boost. Expect a modest horsepower gain, maybe 5‑10 hp, and a warranty of 1‑2 years.

Mid‑range systems sit between £400‑£800. They typically use thicker stainless steel, better mandrel‑bent bends, and higher‑quality mufflers. You’ll hear a richer tone and see gains of 10‑15 hp. Most brands offer a 3‑year warranty and a polished finish.

Premium or performance‑focused exhausts can cost £900‑£2,500 or more. These include titanium or carbon‑fiber components, custom‑tuned headers, and aggressive muffler designs. They’re built for serious sound, maximum flow, and up to 20‑30 hp gains. Expect a longer warranty, sometimes up to 5 years, and a finish that resists rust.

Installation Costs and Hidden Fees

Many DIY enthusiasts think they can save by installing the system themselves. If you have the right tools and a lift, you can cut the labor bill. But remember, a poor install can lead to rattles, leaks, or even damage to the engine.

Professional installation typically adds £100‑£300 to the total bill. This covers labor, alignment checks, and a quick test run. Some shops also charge a small disposal fee for the old exhaust, usually £20‑£40.Don’t forget taxes and possible registration updates if your local laws require a noise inspection. In the UK, certain exhausts need to meet noise limits, so a compliance check might add another £30‑£50.

One tip to keep costs down: ask the installer if they can reuse stock hangers or clamps. Re‑using these parts can shave £20‑£50 off the labor cost.

Now that you know the price ranges, think about your budget and goals. If you only want a louder sound for weekend drives, a budget cat‑back is fine. If you’re chasing performance for track days, invest in a premium header‑plus‑cat setup and pay for a reputable shop to fit it.Finally, compare a few brands and read user reviews. Look for real‑world reports on fit‑ment, durability, and sound. A cheap system that rattles after a month isn’t a saving at all.

Bottom line: Exhaust system cost varies widely, but you can plan your spend by deciding on sound, performance, and how much work you want to do yourself. With the right research, you’ll get the right exhaust without breaking the bank.