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Exhaust› Exhaust Pipes, Systems and Components

REMARK

Axle-Back Exhaust System

Name: Axle-Back Exhaust System
Brand: REMARK
SKU: RO-TSE4/TTE4-DM

$995.00 $936.05 Save $58.95

SKU: RO-TSE4/TTE4-DM

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$100 Minimum Order

Non-Returnable Item

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.

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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

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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

Brand	REMARK
Part Number	RO-TSE4/TTE4-DM
Category	Exhaust

Videos

INSTALLING REMARK AXLE BACK EXHAUST ON LEXUS IS350 IN DETAIL

REMARK Lexus IS300/IS350 Axleback 2021+ [Vehicle: IS350 (3.5L V6)]

REMARK Lexus IS350 2014~2016 Axle-Back Exhaust System (V6)

Lexus IS350 Remark axle back install and sound clip

Remark axleback exhaust for Lexus IS350

REMARK Muffler Version Axleback - Lexus IS200T / IS250 / IS300 / IS350 (2014 - 2016)

Lexus 3IS IS300 Remark....DUPE axle back exhaust!

Remark 2021+ Lexus IS350 Axle Back Exhaust

REMARK Muffler Version Axleback - Lexus IS300/IS350 2021+

REMARK Lexus IS300 2017+ Axle-Back Exhaust System (2.0Liter Turbo)

Remark Axle-Back Exhaust vs. Stock Exhaust | 2017 Lexus IS350

Lexus IS 350 F-Sport 0-60MPH | Stock vs. Remark Exhaust

Remark Axleback exhaust Lexus IS 2021+ (with mufflers)

Lexus IS350 OEM stock exhaust vs Remark Muffer axleback version just installed 2024

Lexus IS350 - Apexi Midpipe and Remark Axleback (Launch)

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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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