Top Performance Upgrades to Start With
You've decided it's time to make the car faster, or sound better, or handle sharper — but the moment you start looking at parts, you're buried in options that all claim to change how your car drives. Exhaust. Coilovers. Upgrade kits tied to a specific engine code you have to double check against your VIN.
Here's what each of these actually does, so you're buying toward a goal instead of just buying parts.
Performance upgrade kits
A performance upgrade kit — like the kind that boosts horsepower on a specific engine platform — typically reworks how air and fuel move through the engine to unlock power the factory tune leaves on the table. These kits are usually engineered for a specific make, model, and engine code, which matters: a kit built for one platform isn't a generic bolt-on for anything with a similar-sized engine.
What to check before buying: confirm the kit matches your exact engine code, not just your car's general trim name — a lot of platforms run multiple engine variants that look similar on paper but require different parts.
Exhaust systems
An upgraded exhaust does two main things: reduces backpressure, letting the engine breathe more freely, and changes the sound profile of the car. Gains vary a lot by vehicle and setup, so if a listing promises a huge horsepower number from exhaust alone, take it with a grain of salt — exhaust is usually a supporting upgrade, not a standalone power adder.
What to check before buying: whether the system is a cat-back, axle-back, or full system — each replaces a different portion of the stock exhaust, with different cost and install complexity.
Coilovers
Coilovers replace your factory suspension with an adjustable setup, letting you dial in ride height and, on higher-end kits, damping stiffness. This is less about raw power and more about how the car handles — sharper cornering, reduced body roll, and the ability to get the stance you actually want instead of what the factory decided for you.
What to check before buying: whether the kit is full coilovers, replacing the whole strut assembly, or a lowering spring kit — cheaper, less adjustable, and keeps your factory struts.
Where to actually start
If you're building out a performance setup for the first time, a reasonable order of operations: suspension first if handling is your priority, since there's no point making more power than your chassis can put down confidently. Exhaust and upgrade kits next, for a meaningful, noticeable change in how the car drives and sounds. Everything else builds from there based on what you're actually chasing — track days, daily driving feel, or straight-line power.
The most common mistake we see is drivers stacking upgrades without a clear goal. Figure out what you actually want the car to do differently, then buy toward that — not just toward a parts list.
Bottom line
Upgrade kits unlock power the factory tune leaves behind. Exhaust changes sound and supports airflow. Coilovers change how the car handles, not how hard it hits. Know which one actually gets you closer to what you want before you spend the money.
Ready to build toward your goal? Browse our performance parts by make and model and start with the upgrade that actually matters for your build.