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

Fluidampr 08.5+ VW Golf TSi/08-13.5 Passat TSi/08.5+ Audi TT TSi Steel Internally Balanced Damper

 

The Fluidampr Steel Internally Balanced Damper (Part No. 551231) is a premium performance harmonic damper designed for Volkswagen Group EA888 TSI engines. 

Unlike the factory rubber harmonic balancer, it uses viscous fluid technology to absorb crankshaft torsional vibrations over the entire RPM range.  

Key Features

• Viscous harmonic damping for superior vibration control.
• Internally balanced design, making it suitable for engines that are internally balanced from the factory.
• CNC-machined high-strength steel construction.
• Black zinc corrosion-resistant finish with engraved timing marks.
• SFI 18.1 certified for high-performance and motorsport applications.
• Maintenance-free sealed design.
• Made in the USA.  

Benefits

• Reduces harmful crankshaft torsional vibrations.
• Helps protect:
• Crankshaft
• Main bearings
• Timing chain
• Oil pump drive
• Accessory drive components
• Improves ignition timing stability at high RPM.
• Can recover small amounts of horsepower and torque otherwise lost to crankshaft oscillation.
• Particularly beneficial on Stage 2, Stage 3, hybrid turbo, or big turbo TSI builds.  

Compatible Vehicles

This damper fits many VAG models equipped with EA888 TSI engines, including:

• Volkswagen Golf GTI Mk6
• Volkswagen Passat
• Audi TT
• It also fits numerous other EA888-powered Audi A3, Audi A4, and related Volkswagen models depending on engine variant. Always verify fitment by engine code or VIN.  

Technical Explanation

A four-cylinder turbo engine naturally produces torsional crankshaft vibrations every time a cylinder fires. As engine output rises through higher boost, more ignition advance, and increased cylinder pressure, these vibrations become stronger.

A conventional OEM harmonic balancer uses a bonded rubber ring tuned for stock operating conditions. Over time, the rubber ages, hardens, and becomes less effective—especially on modified engines.

Fluidampr instead uses a free-floating inertia ring suspended in silicone fluid. As the crankshaft twists, the inertia ring lags behind, and the silicone fluid converts vibration energy into heat. 

This allows the damper to continuously adapt across the RPM range rather than being effective only at a narrow frequency.

The result is:

• Better crankshaft stability.
• Reduced fatigue on rotating components.
• Improved durability during sustained high-RPM operation.
• Increased reliability for engines producing significantly more power than stock.

For enthusiasts running upgraded turbochargers, aggressive ECU calibrations, or regular track use, a Fluidampr is considered one of the best long-term engine protection upgrades because it reduces stress rather than simply adding horsepower.  

Fluidampr 08.5+ VW Golf TSi/08-13.5 Passat TSi/08.5+ Audi TT TSi Steel Internally Balanced Damper

Toyota Corolla GR 3-cylinders VS Audi RS3 5-cylinders (the odd number cylinders)

 

The Toyota G16E-GTS (GR Yaris/GR Corolla) 3-cylinder and Audi RS3’s 2.5 TFSI 5-cylinder are examples of odd-cylinder engines, which are uncommon compared to 4-, 6-, and 8-cylinder designs.

Why use odd numbers of cylinders?

Engineers choose odd-cylinder layouts when they want a balance between:

• Compact size
• Lower weight
• Unique power delivery
• Distinctive sound
• Packaging advantages

Toyota G16E-GTS 3-Cylinder

Why Toyota chose 3 cylinders

The GR Yaris was designed for rally homologation.

Advantages:

• Extremely compact
• About 10-15 kg lighter than a comparable 4-cylinder
• Shorter crankshaft reduces rotational losses
• More room for AWD drivetrain and cooling
• Faster engine response

Disadvantages

• More vibration than an inline-4
• Requires balance shaft engineering
• Rougher idle characteristics

Power density

The 1.6L G16E produces:

• Up to 304 hp (GR Corolla)
• Around 190 hp per liter

One of the highest-output production 3-cylinder engines ever built.

Audi RS3 2.5 TFSI 5-Cylinder

Why Audi keeps the 5-cylinder

The RS3’s engine traces its heritage to the legendary Audi Quattro rally cars of the 1980s.

Advantages:

• Smoother than a 4-cylinder
• More compact than an inline-6
• Strong low-end torque
• Unique firing order creates the famous Audi warble

Disadvantages

• Longer and heavier than a 4-cylinder
• More expensive to manufacture
• Packaging is tighter in transverse applications

Sound Character

The 1-2-4-5-3 firing sequence creates the iconic uneven exhaust note:

Growl + warble + turbo whistle

Many enthusiasts consider it one of the best-sounding modern turbo engines.

Comparison to the classic B18C, 2JZ, VR38DETT as per table 

Engine	Character
Toyota G16E 3-cylinder	Lightest, most aggressive, rally-focused
Honda B18C 4-cylinder	Best balance of smoothness, revs, simplicity
Audi 2.5 TFSI 5-cylinder	Most charismatic sound and torque
Inline-6 (2JZ, RB26)	Smoothest and strongest potential

For pure driving excitement, many enthusiasts rank them:

1. Audi 2.5 TFSI 5-cylinder
2. Honda B18C VTEC
3. Toyota G16E-GTS 3-cylinder

The Audi wins on sound and torque, the Honda wins on naturally aspirated response and mechanical feel, while the Toyota wins on power-to-weight and modern rally-car character.