Video summary

【公式】土屋圭市、無限のパフォーマンスダンパーを今度は一般道でテストしてみました！

Main summary

Key takeaways

Product Review

Product reviewed

Performance damper kit (joint development) by Mugen × Yamaha for the Honda Civic Type R (FL5). Testing context includes both:

  • Circuit (previously)
  • This video’s main focus: public roads

Key features mentioned

  • Damper modes, including:
    • Comfort
    • An R/Sport-type mode (“R mode”) with different tuning behavior
  • Intended to provide sport sharpness without harsh, “pointy” reactions on rough road surfaces.
  • On street use, the ride is described as more rounded, reducing the “bouncing/impact” feel often noticed on track.
  • Designed to deliver better ride quality while keeping sport capability, including confidence through corners.
  • Positioned as an upgrade that can work even if you don’t want to lower the car or install a full suspension system.

User experience (how it feels)

Comfort / everyday driving

  • “Comfort is very usable”—the ride is described as comfortable and passenger-friendly.
  • The presenter says public-road behavior changes the sharpness: what feels peaky on track becomes rounded on the street.
  • Emphasis that the upgrade stays enjoyable even for casual drivers (described as “old men” in the presentation).

Sport / R mode

  • Compared with stock FL5 behavior, R mode is still stiff, but the response is described as:
    • Less sharp
    • Less bumpy
    • More rounded
    • Kinder input (smoother control response)
  • The presenter repeatedly highlights that the difference is “clearly visible” over seams and undulations—the ride remains composed.

Pros (as stated)

  • Major improvement in ride quality on normal roads versus stock.
  • Sport feel without “sharp points”—described as more rounded and stable.
  • Good cost-performance: compared to a “super high-end damper” experience at a much lower price.
  • Works without requiring car-height lowering, unlike some alternative suspension directions.

Cons / limitations mentioned

  • In R mode, there can still be bouncing under more aggressive inputs/conditions (noted as “bounce back and forth” depending on stroke and road impact).
  • No separate “regret” about handbrake is clearly blamed on the damper (not explicitly attributed to it).
  • Circuit vs street behavior is said to differ somewhat, so track results don’t translate perfectly.
  • A setup constraint is mentioned: if you fully match other mods (e.g., a rear wing with lowered suspension), you might feel limited—but the damper itself avoids needing that route.

Price / value (numerical)

  • Cost: ~100,000 yen (tax included)
  • Comparison: race-spec dampers ~1 million yen
  • Overall value conclusion: it’s described as “cheap” relative to the comfort improvement.

Comparisons made

  • To stock FL5 Type R
    • Comfort and Sport/R modes are compared, with the Mugen/Yamaha damper described as more refined and positioned as higher-end than stock.
  • To other suspension approaches
    • Positioned against the “lower the car height” route (e.g., those aiming for more stance), framing this as a way to avoid wasting the factory baseline.
  • To other future plans
    • The speaker suggests adding other suspension parts later (e.g., “spoon down suspension”) may make the electronic damper behavior “come alive,” but that’s framed more as a next step than a direct comparison.
  • Infinite performance damper mention
    • The video frames this damper as a worthwhile add-on even if you’re currently on normal suspension.

Overall verdict (condensed)

Strong recommendation. The Mugen × Yamaha performance damper upgrade is portrayed as delivering a noticeable comfort improvement on public roads while preserving sport-mode capability. The presenter calls its cost performance (~100,000 yen) excellent versus far pricier damper options.

The main downside: R mode can still feel bouncy on larger inputs, and track vs street feel isn’t identical—but for everyday usability, the upgrade is presented as clearly beneficial.

Unique points mentioned (deduplicated)

  1. Tested whether the damper works well on general roads, not just track.
  2. On track, R mode can feel bouncy/peaky (“pointy part” jumping).
  3. On public roads, that effect becomes more rounded, improving comfort.
  4. Stock FL5 base is described as well-made and satisfying.
  5. R mode is described as helping you get good times versus Comfort’s track bouncing.
  6. Tire/behavior note: S tires are soft, and software tuning may be aligned.
  7. First impression: FL5 feels like a “real Type R.”
  8. Praises craftsmanship plus general vehicle feel (steering/gear/overall characteristics).
  9. Notes an FR-like operating feel as a reason people buy into this kind of concept.
  10. Main upgrade: Mugen × Yamaha performance damper is the key difference vs normal.
  11. In Comfort, ride feels softer/rounder with improved texture.
  12. In Sport/R, it stays stiff but becomes rounder, less sharp, less bumpy.
  13. R-mode behavior: big stroke can cause a bouncing back-and-forth sensation.
  14. Maintains a more stable sports ride even with impacts.
  15. Positioned for people who don’t want to lower car height or replace full suspension.
  16. Improvement is most evident over seams and undulations.
  17. Suggests many normal-car riders would want the upgrade because they notice the difference.
  18. Cost-performance claim: ~100,000 yen for “super high-end” ride feel vs ~1 million yen race dampers.
  19. Warns that stock vs upgraded dampers can be so different it creates indecision about what to do next.
  20. Mentions future mods (down suspension) may further activate electronic damper behavior.
  21. Ending takeaway: on street, the improvement is easier to understand than on track.

Speaker notes

  • Single main speaker (DKTV host / car reviewer) delivers the impressions.
  • No clearly separated multi-speaker technical counterpoints are present in the subtitles beyond brief on-screen style lines; views are attributed mainly to the host.

Original video