• Nameless Performance [19 - 21 STI, 18 STI Type RA] Axle Back 4" Single Wall Polished Tips 5" Mufflers | SUAB15WRX - 5MU - 40SSW - 19STI - JDMuscleAxle Back ExhaustsSUAB15WRX-5MU-40SSW-19STI

Nameless Performance

Nameless Performance Be the first one to review

Axle Back 4" Single Wall Polished Tips 5" Mufflers

Fits: 19-21 STI, 18 STI Type RA

$97000
Earn $19.40 In JDMuscle Rewards!
Profile Avatar

Talk to an Enthusiast

Verify Fitment & Product Recommendations

M-F 9:00AM - 6:00PM

(866) 833-3536 Email Text (610) 735-6688Text
Ships When Available-Lead Time Applies
Pay over time available · Est. $30.31/payment
ⓘ

Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

Katapult Affirm Klarna Shop Pay
View all options
Pay over time available · Est. $30.31/payment
ⓘ

Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

Katapult Affirm Klarna Shop Pay
View all options
Nameless Performance Axle Back 4" Single Wall Polished Tips 5" Mufflers
Fits: 19-21 STI, 18 STI Type RA
Be the first one to review

Fitment

  • 2018 Subaru | WRX STI Type RA
  • 2018-2021 Subaru | WRX STI

Description

This axleback system is a direct bolt-on upgrade for the VA Chassis STI, replacing the restrictive 13.5lb factory mufflers with TIG-welded, mandrel-bent T304 stainless steel piping for improved flow, sound, and weight savings.

Featuring 4" single wall tips, this version offers a bold, clean look. With 18 total configurations available—ranging in muffler size and tip finish—there’s an option for every sound and style preference. Check the vehicle page to explore more.

Key Details:

  • Direct fit to OEM midpipe (not compatible with SPT midpipe)

  • 5" Mufflers

  • Dual 2" piping = flow of a 3" straight pipe

  • Estimated gains: +10hp / +11ft-lbs torque

  • T304 stainless construction, laser-cut flanges

  • Includes hardware kit for easy install

  • Fits 2018 STi Type RA and 2019–2021 STI sedans

Balanced tone, weight savings, and noticeable performance improvements—tailored to your build

Shipping and Delivery

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

Warranty and Support

For Nameless Performance warranty information, contact our support team.

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