What Are Dry Carbon Fiber and Kevlar Parts Used For on Cars?

Updated

Dry carbon fiber and Kevlar parts on cars serve two main purposes: reducing weight and adding a finished, performance-oriented look to specific areas of the vehicle. On Tecnocraft Composites, these parts appear as exterior aerodynamic pieces (like Gurney flaps) and engine-bay dress-up items (like spark plug covers), with fitments listed for Honda models such as the Integra Type-R and Civic Si. If you are shopping for lightweight cosmetic or aero upgrades rather than structural replacement panels, these are the categories to compare.

Dry carbon fiber parts: exterior and aerodynamic use

Dry carbon fiber is used where low weight and a clean, structural-looking finish matter. On the Tecnocraft site, the clearest example is the Password:JDM Dry Carbon Fiber Gurney Flap (also called a wickerbill), described as a short lip that protrudes upward from the rear of the car.

  • Function: A Gurney flap adds a small upward lip at the trailing edge of a wing or body panel to influence airflow at the rear.
  • Listed applications: 02–06 Integra Type-R, 94–01 Integra Type-R 2DR, 99–00 Civic Si, and 12–13 Civic Si 2-Door.
  • Price range shown: from about $209.99 to $239.99 depending on the model.
  • Availability note: some fitments are marked Sold Out, so check stock before planning a build around a specific part.

Dry carbon fiber also shows up in smaller interior/trim pieces, such as the Dry Carbon Fiber Airbag Tray (DC 94–01 Integra, LHD) at $149.99.

Kevlar parts: engine-bay and dress-up use

Kevlar appears on the site mainly as a cosmetic/engine-bay material rather than an aerodynamic one. The example is the Password:JDM Dry Carbon Kevlar Spark Plug Cover (B-Series) at $129.99.

  • Function: Covers and finishes the spark plug area of the engine bay.
  • Material note: listed as "Dry Carbon Kevlar," combining the two composite materials.
  • Availability: marked Sold Out at the time of the listing.

So in practice, Kevlar on this site is used for under-hood appearance parts, while dry carbon fiber covers both aero and trim.

How the two compare

Dimension Dry carbon fiber parts Kevlar parts
Typical location Rear aero (Gurney flap), interior trim Engine bay (spark plug cover)
Main purpose Lightweight aero and finished look Engine-bay dress-up
Example part Dry Carbon Fiber Gurney Flap Dry Carbon Kevlar Spark Plug Cover
Example price from $209.99–$239.99 $129.99

Both are described as using carbon composite base materials, resins, and mold development techniques, and both emphasize lightweight construction.

Practical buying notes

  • Shipping: Additional shipping charges apply for Canada, Alaska, and Hawaii. Shipping is not billed at purchase; a sales representative contacts you with the charges after the order is received.
  • Lead time: One listed item (Fender Washers) ships in 3–5 business days from purchase; check individual product pages for others.
  • Seller status: The site states it is the Only Authorized Seller For Password:JDM, which matters if authenticity of Password:JDM parts is a concern.
  • Fitment first: Confirm your exact model and year (for example, 94–01 Integra 2DR vs. 02–06 Integra Type-R) before ordering, since Gurney flap listings are model-specific.

If your goal is a lightweight rear aero piece, dry carbon fiber Gurney flaps are the relevant category. If your goal is finishing the engine bay, the carbon Kevlar spark plug cover is the matching example.