If you have a 2022-on Honda Civic Si, and want a bit more power and sound, then Thermal R&D has the perfect upgrade for you.

We have been building and developing drone-free exhaust systems for decades. When the 2022 Civic Si was launched, we designed a bespoke system that really transformed the driving experience. 

The Two Step Performance Install

The folks at Two Step Performance installed our system on their 2023 Civic Si, and the results speak for themselves.

Aside from a bent spanner, the installation went very smoothly. Every nut, bolt, and tube has been engineered to fit perfectly and deliver a factory-look finish. The quality is in the details, and we use mandrel-bent tubing, durable 304 stainless steel, and ceramic-coated mufflers.

Our systems are easy to install—no cutting or drilling is required—and, as you can see from the video, the exhaust tucks up against the undercarriage for maximum ground clearance.

You can hear the great sound the Civic Si makes after the installation as it is put through its paces.

We gotta say that it definitely delivers!

Two Step Performance

Our exhausts are designed with Drone Free True Helmholtz Technology. This removes the drone that is common on many aftermarket systems but doesn’t take away the great sound.

Highlights Of The Thermal R&D Honda Civic Si Exhaust

• 3" Mandrel Bent T-304 Stainless Steel Tubing 
• Full Polished or Black Ceramic Tip Options
• Designed with High-End Compression Clamps to Allow for Maximum Adjustability
• Front Pipe Back Exhaust System

The drone-canceling mufflers were designed to work internally on this system. This reduces overall weight and cost while delivering great drone-free sound. 

Order Your Drone-Free Exhaust Today

Every Thermal R&D exhaust is designed with Drone-Free True Helmholtz Technology. This eliminates the drone you get in many aftermarket systems.

We have been perfecting the art of drone-free exhaust for 40 years. All our systems are manufactured in the USA from premium materials.

We’re also proud to offer a lifetime warranty. Upgrade your Honda Civic Si with one of our premium exhaust systems and experience the difference for yourself. Call our team at (661) 338-6442 or contact us online.