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Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
Seibon Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover
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Seibon 2022+ Toyota GR86/Subaru BRZ Carbon Fiber Rear Diffuser Cover

Seibon
SEIRD22TY86-MB
Diffusers
8 Units In Stock - Ships Next Business Day
$ 1,250.00 $ 1,125.00
$ 1,125.00

Lightweight carbon fiber rear diffuser for the compatible vehicles

The Seibon RD22TY86-MB is a hand-laid 3K 2x2 twill weave carbon fiber over a fiberglass skeleton rear diffuser built specifically for the compatible vehicles. The UV-resistant gloss clear coat is factory-applied and ready to install. At up to 50% lighter than the OEM steel equivalent, it reduces unsprung weight for measurable gains in acceleration, braking balance, and cornering response.

Key Features

  • Rear Aerodynamic Balance: Accelerates exiting underbody airflow to generate rear downforce and reduce rear lift, improving stability at speed.
  • 3K 2x2 Twill Weave Construction: Hand-laid carbon fiber over a fiberglass skeleton delivers precise aerodynamic geometry with consistent surface finish.
  • UV-Resistant Gloss Clear Coat: Show-quality carbon finish requiring no paint preparation.
  • Direct Bumper Fitment: Mounts to factory rear bumper lower mounting points with no cutting required.
  • Seibon Fitment Guarantee: Verified against the target vehicle before production release.
  • Aggressive Motorsport Styling: Transforms the rear fascia with functional multi-channel diffuser geometry.

Specifications

Detail Value
Part Number RD22TY86-MB
Material 3K 2x2 twill weave carbon fiber
Finish Gloss UV-resistant clear coat
Construction Hand-laid with fiberglass skeleton
Weight Savings Up to 50% lighter than OEM equivalent
Hardware Uses OEM mounting hardware; not included
Warranty Seibon 6-month limited clear coat warranty; fitment guarantee

What's Included

  • 1x Seibon carbon fiber rear diffuser
  • Mounting hardware where applicable

Installation

  1. Gather tools: panel pop tool, 10mm socket, Phillips screwdriver, painter's tape.
  2. Safely raise the rear of the vehicle on jack stands for comfortable access to the rear bumper underside.
  3. Remove the rear undertray or splash shields if present.
  4. Pre-fit the diffuser against the rear bumper to confirm alignment before fastening.
  5. Attach the diffuser using factory-location push clips or supplied hardware, working from center outward.
  6. Torque any bolt locations to 8-10 Nm maximum. Do not overtighten on carbon flanges.
  7. Reinstall undertray panels.
  8. Lower the vehicle and inspect gap alignment along the bumper lower edge.

Frequently Asked Questions

Does installation require cutting the OEM bumper?

No. Seibon diffusers are designed to mount under the existing rear bumper using factory clip locations. Always pre-fit before making any modifications.

What is the warranty?

Seibon provides a fitment guarantee and a 6-month limited clear coat warranty. Under the Magnuson-Moss Warranty Act, this product does not void your vehicle's factory warranty.

Will this affect exhaust heat near the rear bumper?

Carbon fiber has moderate heat resistance, but prolonged direct exhaust heat can affect the clear coat over time. Ensure exhaust tips are directed away from the diffuser surface, especially on high-output vehicles.

Is painting required?

No. The gloss clear coat finish is factory-applied and ready for installation. Painting is optional for color-matched applications.

Can I install this at home?

Yes. The installation is straightforward with basic hand tools and does not require professional bodywork experience.

How do I maintain the finish?

Wash with mild soap and a microfiber cloth. Apply UV-protectant wax regularly. The underside of the diffuser is exposed to road spray; inspect for chips periodically.

Is this compatible with aftermarket exhaust systems?

Fitment is based on OEM rear bumper and exhaust tip geometry. Verify exhaust tip positioning with aftermarket systems before purchasing.

Does this affect ground clearance?

On stock-height vehicles, Seibon diffusers maintain adequate ground clearance. On significantly lowered vehicles, measure clearance before purchasing.

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