RV6 Bellmouth Downpipe for 12-15 Civic Si/13-15 ILX

RV6 Performance Bellmouth Downpipe for 12-15 Civic Si/13-15 ILX

Unlock the hidden power and sound of your K24Z7 with the RV6 Performance Bellmouth Downpipe for 12-15 Civic Si. By replacing the cramped factory twin-cat precat with a single, high-flow 200-cell metallic catalyst, this bellmouth design clears the way for faster exhaust scavenging, crisper throttle response, and an honest bump in mid-range horsepower and torque.

Product Features

• Crafted from thick-wall 304 stainless steel
• TIG-welded inside and out after a full back-purge for race-car-grade weld integrity
• Smooth cast bellmouth merges exhaust pulses before reaching the 2.5-inch mandrel-bent tubing
• Eliminates turbulence and drone while allowing free exhaust flow
• Woven stainless flex section absorbs vibration and heat-cycle expansion

Options

Choose from:

• Raw stainless for a classic look
• Black or silver ceramic coating for extra heat management and corrosion resistance, perfect for turbo builds or harsh winter climates

Whichever finish you select, you get a direct bolt-on upgrade that mates flawlessly to the OEM mid-pipe or any cat-back system using factory-style flanges and O2 sensor provisions. No check-engine lights, no compromises—just a deeper growl and performance you can feel every time you hit VTEC.

Installation Snapshot

• Skill Level: Moderate
• Time: 1–2 hours
• Includes new gaskets & hardware
• No cutting required
• Flash/tune optional for maximum gains