FREE SHIPPING* On Orders Over $199 within 48 States
Shop in Confidence with Our Price Protection Program!
The 1% Award · Auto Parts Store of the Year 2026
Clear Car Save Vehicle
  • JDMuscle [15-21 WRX/STI] Carbon Fiber Diffuser CS Style | JDM-WRX15-RD21
  • JDMuscle [15-21 WRX/STI] Carbon Fiber Diffuser CS Style | JDM-WRX15-RD21

JDMuscle

JDMuscle 5.0 (1)

Carbon Fiber Diffuser CS Style

Fits: 15-21 WRX/STI

D-Drop Ship Only
$34900
Earn $6.98 In JDMuscle Rewards!
Special Order - Ships Directly From MFG: on average this item takes 21 days to ship. No Cancellation
Financing available starting $10.90 /month and as low as 0% APR.

Auto Parts Store of the Year 2026

JDMuscle Carbon Fiber Diffuser CS Style
Fits: 15-21 WRX/STI
5.0 (1)

Estimated Shipping Widget will be displayed here!

Profile Avatar

Talk to an Enthusiast

Verify Fitment & Product Recommendations

M-F 8:30AM - 5:00PM

(866) 833-3536 Email

Fitment

  • 2015–2021 Subaru | WRX STI
  • 2015–2021 Subaru | WRX

Description

Quality Material and Craftsmanship
Tanso Carbon Fiber is vacuum-bagged and cured in the autoclave at high temperatures, ensuring quality, durability, and extremely-high strengh-to-weight ratios.
Fade-Resistant Clear Coat
Tanso Carbon Fiber is finished with UV-stable, production clear coat paint, then individually hand-polished to a brilliant shine.
Easy Installation
Tanso Carbon Fiber is designed to factory specifications for easy installation and clean fit and finish. Please make sure to thoroughly clean the surface before installation using rubbing alcohol and a microfiber cloth. This will create a stronger bond for the adhesive.

JDMuscle Tanso Carbon Fiber Under Diffuser fits 2015-2021 WRX/STI

Shipping and Delivery

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Warranty and Support

  • JDMuscle 1-Year Warranty & Lifetime Support

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

Proposition 65

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov