TST WORX Airbox for Kawasaki Ninja 400 (2018-2023)
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TST WORX Airbox for Kawasaki Ninja 400 (2018-2023)

Dispatch in 2-4 weeks
€966.87 €1,208.87 -20.02%
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Upgrade to podium-worthy performance with the TST WORX Airbox. Built from updated premium materials and hand-assembled in our Florida facility, this race-tuned kit includes our exclusive Airbox, Air Filter, and V2 Velocity Stacks that combine to enhance airflow and top-end performance, helping you achieve faster lap times and race day dominance—all at a new, lower price.

Add the tune to ensure your ECU is optimized for the enhanced airflow. Send us a stock, untuned, undamaged, and unmodified Ninja 400 ECU, and we'll flash it with our Stage 3 Tune. For best results, consult a tech who specializes in high-performance race bike tuning. See the Tune Details tab for more info.

This item is not eligible for discounts.

Applications:

Kawasaki Ninja 400 | 2018, 2019, 2020, 2021, 2022, 2023

This product is part of our Worx Program!

Features

  • Replaces the entire stock airbox with a race-developed design
  • 2.5 lbs lighter than the stock setup
  • Bolt-on component - no modification required*
  • Provides 8% increase to peak power compared to stock airbox
  • Provides 5-10% increase in the upper range (9500 - 12500 RPM) compared to stock airbox
  • Carbon fiber and high-strength polymer construction
  • Toray Carbon Fiber Prepreg features a high gloss clear coat for UV protection
  • Includes WORX V2 Velocity Stacks for optimized top end performance
  • Includes specific WORX developed reusable pre-oiled foam air filter
  • Comes pre-assembled and ready for installation
  • Non-ABS and ABS-Compatible versions available

*Small tab located on the frame needs to be bent to provide proper clearance for installation.

Description

Our quest for class domination led our engineers to completely redesign the airbox assembly, seeking top-end power gains through a sophisticated new design that combines with our WORX V2 Velocity Stacks and a proprietary reusable open-cell high-performance foam air filter to deliver a 5-10% increase in the 9500-12500 RPM range. When paired with our WORX Stage 3 ECU tune, or your own custom tune, the results are instantly noticeable. The WORX Airbox completely replaces the stock setup, including the stock air filter and velocity stacks, and replaces them with specifically designed components that take advantage of the improved airflow and further optimize the volumetric efficiency for better engine performance and faster lap times. Built with uncompromising quality, this Ninja 400 Airbox is unlike anything else on the market.

Already purchase a WORX Ninja 400 Tune and want to upgrade? We'll provide a free tune reflash if you've already purchased a Stage I or Stage II tune from us before and can send in the same ECU.

The WORX Airbox comes pre-assembled, therefore we are not able to substitute items or customize the airbox or velocity stacks per order.

This item is not eligible for discounts.

N400AB_N400AB2_TUNE-2002
Data sheet
Delivery
Dispatch in 2-4 weeks
Kawasaki
  • Ninja 400 - 2018 - 2023
  • Ninja 400 WORX - 2018 - 2023 Supersport
Returns Policy

EU/EEA customers have a 14-day right of return from the day the goods are received. The goods must be unused, with tags attached and in the original packaging.

All returns must be pre-approved: e-mail info@mrttech.ee within 14 days of receiving the goods, stating the order number, and wait for our written confirmation before sending anything back. Return shipping is arranged and paid for by the customer.

Once we have received and inspected the returned goods, we issue the refund within 14 days. Where possible we refund using the original payment method (for example PayPal or Stripe), otherwise by bank transfer.

Shipping

Parcel machine (Estonia, Latvia, Lithuania, Finland) – €9.90. Courier (non-express) – from €19.00, within the EU and internationally, with the exact cost calculated at checkout. Collection in store at Taevakivi 1, Tallinn – free. Free delivery on orders of €500 or more. Prices include VAT where applicable.

In-stock items are normally dispatched within 1–3 working days from release from our warehouse. Delivery times are estimates, not guarantees — some items may take longer, for example when ordered in specially or during stock or supplier delays. We are not liable for delays beyond our reasonable control, but we always make reasonable efforts to deliver at the earliest opportunity. This does not affect any statutory rights the customer may have as a consumer.

See our full delivery and return terms: shop.mrttech.ee/en/content/1-delivery

Do you have questions about this product: TST WORX Airbox for Kawasaki Ninja 400 (2018-2023)?

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