Exhaust Systems & Kits

Does your car sound too muted, or has the original exhaust rusted through behind the catalytic converter? Here we bring together complete exhaust systems and kits – from cat-back and axle-back to turbo-back and full systems – for you who want to change sound and flow or replace worn pipes with a complete kit.

The difference between system types

The type determines how much of the exhaust you replace. An axle-back system typically only replaces the section behind the rear axle with muffler and tips. Cat-back systems start after the catalytic converter and also include the mid-pipes, e.g. Flowmaster kits for RAM 1500 and F-150. Turbo-back systems run all the way from the turbo and are relevant on turbocharged engines, while full systems can include even more of the piping. The larger the section you replace, the more it can typically affect sound and flow, but the result depends on the engine and other modifications in your project.

How to choose an exhaust system

Start with your car's model year, engine and body style, as many kits are made for a specific combination, e.g. only for Extended Cab or certain engine variants. Then consider:

• Pipe diameter: bigger pipes are not automatically better; the diameter should match the engine size and your power goal.
• Material: stainless and aluminized steel have different resistance to corrosion.
• Sound: the muffler design has a big impact on sound level and cabin resonance.
• Outlet: single or dual outlet and placement of the tips.

Brands in this category include Magnaflow, Borla, aFe, Gibson and Victor Reinz.

Installation and maintenance

Most kits mount in the existing hangers, but old bolts and flanges may be seized with rust. New gaskets plus parts from installation kits and clamps make it easier to get a leak-free system. After the first few drives, you should retighten the joints and check for leaks and rattles.

Frequently asked questions

Will my car pass inspection with a new exhaust system?

That depends on the product and the car. Noise level and any changes to the catalytic converter matter, so check the approval, e.g. E-mark, for the specific part number before fitting the system to a car that will be driven on public roads.

Should I choose cat-back or axle-back?

Axle-back is typically the simplest solution if you mainly want to change sound and looks. Cat-back replaces more of the piping and can therefore affect both sound and flow more – it depends on the specific system.

Why does the cabin drone after installation?

Resonance at certain RPMs can be caused by the muffler design or pipes touching the underbody. Check the hangers and clearance to the body; otherwise a resonator or a different muffler can help.

Can I reuse the old gaskets?

This is typically not recommended. Used gaskets are often compressed or corroded and can cause leaks at the flanges. New gaskets are a small expense compared to having to remove the system again.