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REMARK

Axle-Back Exhaust System

$995.00 $939.72 Save $55.28

SKU: RO-TSE4/TTE4-DM

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Remark axleback is a performance exhaust system designed for 2021+ Lexus IS300 and IS350 models. Featuring two high-flow, straight-through muffler canisters, it produces a deep, sporty tone that remains mild and suitable for daily driving.

Constructed from T304 stainless steel, this kit utilizes 2.5-inch, 16-gauge mandrel-bent piping and 4-inch slant-style double-wall tips. It is fully TIG-welded to ensure durability and offers weight reduction compared to the factory mufflers.
Show original supplier description
The Remark axleback serves as a direct-fit replacement for the OE mufflers on 2021+ Lexus IS300 and IS350 vehicles, including both RWD and AWD configurations. By utilizing high-flow, straight-through muffler canisters, this exhaust provides a refined, sporty tone that enhances engine sound without becoming overbearing, comparable to an optional dealership performance accessory. Built for longevity and performance, the system features T304 stainless steel construction with 2.5-inch, 16-gauge mandrel-bent tubing and 4-inch slant-style double-wall exhaust tips. Each unit is fully TIG-welded to ensure structural integrity and offers a significant weight reduction over the factory exhaust components. Installation is straightforward and requires no cutting or welding, allowing the factory system to be reinstalled easily if needed. The design does not trigger check engine lights and does not affect vehicle emissions systems. Please note that for AWD owners with the 6-speed transmission, customer feedback indicates the possibility of significant drone at low-RPM cruising speeds.
Vehicle Symptoms
  • Stock exhaust is too quiet
  • Want a sportier exhaust note
  • Exhaust sounds muffled or restricted
  • Looking for a deeper tone without drone
  • Factory mufflers look plain or boring
Relevant Conversations
  • 2021 Lexus IS350 axle-back exhaust sound clip
  • Remark exhaust Lexus IS300 vs AWE
  • Best exhaust for Lexus IS350 RWD
  • How to install axle-back exhaust on 2021 IS
  • Lexus IS350 exhaust drone review Remark
  • Remark exhaust vs stock Lexus IS sound comparison
  • Quiet but sporty exhaust for Lexus IS
  • IS300 AWD axle-back exhaust options
  • Remark T304 exhaust Lexus IS longevity
  • Looking for dealership-style performance exhaust for 2021 IS

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandREMARK
Part NumberRO-TSE4/TTE4-DM
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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