Invidia Q300 Single Exit Cat Back Exhaust – Titanium Tip – 2006-2011 Honda Civic Si Coupe

Q300 Single Exit Cat-Back Exhaust with Titanium Tip for the 2006-2011 Honda Civic Si

The Invidia Q300 Single Exit Cat-Back with titanium tip for the 2006-2011 Honda Civic Si brings Q300-level sound refinement to the eighth-generation Si’s K20Z3 naturally aspirated engine. The high-revving K20Z3 responds to exhaust work with improved breathing in the upper RPM range, the Q300’s improved flow is most noticeable from 5,500-8,000 RPM where i-VTEC operates at its best.

DETAILS

• Single exit
• Burnt titanium tip
• Q300 resonated muffler
• 304 stainless
• Mandrel-bent

The K20Z3’s naturally aspirated character at high RPM is enhanced by the Q300’s improved flow, the engine breathes more freely and the sound becomes more expressive. The Q300’s resonated design produces a deep note without drone, which matters on a car that also sees daily highway use.

Titanium burnt tip on the 8th-gen Civic Si adds premium finish to the single-exit rear exit. Q300 sound is the refined, daily-appropriate option compared to the N1.

What’s in the Box

• Cat-back exhaust system (all sections)
• Exhaust tips
• Gaskets
• Mounting hardware (nuts, bolts, hangers)
• Installation instructions

Why Choose Invidia

Invidia has been manufacturing performance exhaust systems in Japan since 1999, and in that time they have built a reputation that carries real weight in the tuning community. Every system is manufactured using SUS304 stainless steel and mandrel-bent tubing, which eliminates the flow restrictions and weak points that crush-bent alternatives introduce at every corner. Their in-house engineering team designs each application from scratch rather than adapting a generic template, which is why Invidia fitment is consistently tighter than the competition. The result is an exhaust that installs cleanly, seals correctly, and lasts. Invidia backs their products with a quality standard that is visible in the finish, the weld quality, and the hardware, details that reflect over two decades of refining the same core manufacturing process.

The RallySport Take

The Q300 titanium on the 8th-gen Civic Si is the exhaust for owners who drive this car regularly and want the K20Z3’s sound improved without going aggressive. The Si sounds good through the Q300 across all driving conditions. Fits the 2006-2011 Honda Civic Si sedan and coupe with K20Z3.

Fitment