Exhaust› Mufflers and Resonators

Yoshimura

Street Series AT-2 Slip-On Muffler

$639.00

SKU: 19450BP520

Special Order
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Yoshimura Street Series AT-2 slip-on muffler is a high-performance exhaust system designed for the CFMOTO 450SS and 450NK models. It features a stainless steel construction with a matte carbon fiber end cap and a custom matte carbon fiber heel guard. This slip-on is engineered to optimize power and enhance the sound of the 449cc parallel twin engine, making it sound significantly larger.

This muffler is proudly designed, developed, and manufactured in Chino, California. It is noted as a replacement part and is not CARB approved, meaning it cannot be shipped to California.
Show original supplier description
The Yoshimura Street Series AT-2 slip-on muffler is a premium upgrade for the CFMOTO 450SS (2023-2026) and 450NK (2024-2026) motorcycles. This exhaust system is meticulously crafted with a durable stainless steel construction and features an eye-catching matte carbon fiber end cap and a custom-fit heel guard, enhancing both the aesthetics and performance of your bike. Engineered to unlock the full potential of the 449cc parallel twin engine, the AT2 slip-on delivers significant power and torque gains. Dyno testing confirms an increase of 6.3% in maximum horsepower and a substantial 10% gain in maximum torque. Beyond the performance benefits, the AT2 dramatically alters the bike's auditory profile, producing a deep, resonant tone that makes the 450SS/NK sound like a larger displacement machine. It weighs considerably less than the stock muffler, contributing to improved overall handling and responsiveness. This Yoshimura AT2 exhaust system is proudly designed, developed, and manufactured in the USA. It is declared a "replacement part" by the manufacturer. Please note that this product is not CARB approved and cannot be shipped to California.

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

BrandYoshimura
Part Number19450BP520
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.

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