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Exhaust› Headers, Manifolds and Components

Akrapovic

Racing 4T Exhaust System

Name: Racing 4T Exhaust System
Brand: Akrapovic
SKU: 79505901044

$1,151.61 $969.99 Save $181.62

SKU: 79505901044

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

It features a stainless steel header and a silencer housing made of high-grade titanium.

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The Akrapovic Racing 4T Full Exhaust System is engineered to elevate the performance of your KTM 450 SMR (2021-2022). The "FEATURES:" list highlights significant improvements, including increased torque, more power, and a broader useful rev range. Riders can expect more balanced engine braking (drag torque) and refined power delivery, leading to better overall maneuverability and a more precise throttle response. The system also provides a full sound experience and aims for more grip through refined engine mapping, with an optimally adjusted header design to match the stock engine. This exhaust system complies with current FIM and AMA noise regulations. The "MATERIAL:" is listed as Stainless Steel and Titanium, and it holds "HOMOLOGATIONS:" of CCCUO_EU / FIM.

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	Akrapovic
Part Number	79505901044
Category	Exhaust

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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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