Honda Civic Si Parts

More power, better sound—our aftermarket exhaust systems are built to perform. Designed for maximum flow, aggressive sound, and real horsepower gains, these exhausts bring out the best in your build. Shop now!

Shop Honda Civic Si Parts and more below.

Crank Up the Power with High-Performance Exhausts

Looking for a deeper tone, better throttle response, and increased power? With our selection of aftermarket exhaust system parts, you get the perfect mix of performance and sound. Choose from cat-back, axle-back, and full exhaust kits, all built with high-grade materials like stainless steel and titanium for ultimate durability.

At Redline360, we stock only from the top brands—MagnaFlow, Borla, HKS, Tomei, and more—so our customers get nothing but the best in sound, style, and performance. Whether you’re upgrading for a deeper exhaust note or squeezing out extra horsepower and torque, we’ve got the perfect exhaust systems for you.

How to Find the Right Exhaust Upgrade for Your Build

Buying the perfect exhaust setup for you starts with knowing what you want. If you're looking for better throttle response and power gains, a cat-back or axle-back system is a great start. For maximum gains in horsepower and torque, full exhaust systems with headers, high-flow cats, and larger piping will make the biggest impact.

Beyond performance, sound and material matter, too. Some performance exhausts are built to deliver a sporty note, while others produce a loud, race-inspired growl. Check out exhaust clips and reviews to find a sound you like. For materials, we recommend you go with stainless steel or titanium, as they offer better longevity and corrosion resistance.

When shopping for exhausts, you must also consider the product’s ease of installation. Some aftermarket exhaust systems are bolt-on, while others require professional tuning. And, make sure you're choosing exhaust system parts designed for your make and model to avoid installation headaches.

Shop High-Performance Aftermarket Exhaust Systems

Serious performance starts with the right upgrades. At Redline360, we bring you premium exhaust systems alongside top-rated suspension upgrades, air intake kits, and more—all at competitive prices with fast shipping and hassle-free returns. We provide live inventory updates so you know what’s in stock and ready to ship.

We also give you the option to purchase product and shipping protection for complete peace of mind. Shop with us for quick delivery and dedicated support. Ready to upgrade your ride? Explore our performance car parts to take your build to the next level. Build your dream car and save!