Honda FL5 Type R Titanium Valved Exhaust System - Yonristic Performance

The Honda Civic Type R FL5 Titanium Valved Exhaust System by Yonristic Performance is a premium cat-back exhaust designed to improve sound, reduce weight, and enhance exhaust flow while retaining everyday drivability. 

It is available in either T304 stainless steel or Grade 5 titanium, with OEM-compatible or remote-controlled valve options.  

Technical Analysis

1. Grade 5 Titanium Construction

• Approximately 40–45% lighter than a comparable stainless-steel system.
• Excellent corrosion resistance.
• Higher stiffness than stainless steel, producing a sharper, more exotic exhaust note.
• Lower weight behind the rear axle slightly reduces polar moment of inertia, helping turn-in response.

2. True 3.0-inch Mandrel-Bent Piping

• Constant internal diameter maintains exhaust gas velocity.
• Reduces backpressure compared with the factory exhaust.
• Benefits include:
• Faster turbo spool
• Improved high-RPM breathing
• Better throttle response
• Increased power potential for tuned engines

3. Electronic Valve System

Two configurations are available:

• OEM Valve Control – integrates with the factory exhaust valve control system.
• Remote Control – allows the driver to manually open the valves completely regardless of drive mode.

Valve closed:

• Quiet cruising
• Reduced cabin drone
• Suitable for daily driving

Valve open:

• Maximum exhaust flow
• Louder, more aggressive sound
• More pronounced turbo whistle, crackles, and overrun.

4. High-Flow Resonator

Rather than simply making the car louder, the resonator is tuned to:

• Reduce drone around highway speeds.
• Maintain a deep exhaust tone.
• Preserve the distinctive Honda high-RPM character.

5. Triple-Tip Design

The FL5 retains Honda’s signature triple-exit layout.

Yonristic enlarges the outer tips while keeping the center outlet functional for:

• Improved exhaust gas distribution.
• A fuller exhaust tone.
• More aggressive aesthetics.

Tip finishes include:

• Chrome
• Burnt titanium
• Gloss carbon fiber
• Matte carbon fiber.  

Performance Potential

Manufacturer claims include:

• Improved exhaust flow.
• Sharper throttle response.
• Weight reduction (especially with titanium).
• No ECU tune required.
• Bolt-on installation using factory mounting points.
• Compatible with the OEM rear diffuser.  

Actual horsepower gains on an otherwise stock FL5 are likely to be modest, typically in the single-digit horsepower range. Larger gains generally require complementary upgrades such as a high-flow downpipe, intake, intercooler, and ECU calibration.

Advantages

• Lightweight Grade 5 titanium option.
• Electronically controlled valves for quiet or aggressive operation.
• Reduced exhaust restriction.
• High-quality TIG welding.
• OEM-like fitment.
• Premium motorsport appearance.
• Excellent platform for future performance upgrades.

Possible Drawbacks

• Premium price (starting around US$2,499 depending on configuration).  
• Titanium can produce a slightly raspier tone than stainless steel.
• Performance gains without supporting modifications are relatively small.
• Less established track record than long-standing Japanese brands such as HKS, Spoon Sports, Mugen, or A’PEXi.

Overall performance 

Category	Score
Engineering	(9.5/10)
Sound Quality	(9.5/10)
Weight Reduction	(10/10 for titanium)
Daily Comfort	(9/10 with valves closed)
Track Performance	(9/10)
Value for Money	(8/10)

Honda FL5 Type R Titanium Valved Exhaust System - Yonristic Performance