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TST Emission Block Off Kit for Kawasaki Ninja 400 2018+ / Z400 2019+

TST Emission Block Off Kit for 2018+ Kawasaki Ninja 400 / Z400 What's included in the TST Kawasaki Ninja 400 / Z400 Block Off Kit. Smog block off plate is manufactured from CNC machined aluminum with a gorgeous black anodized finish. Remove your Kawasaki Ninja 400 or Z400 AIS system with the TST Emission Block Off Kit. Prevent your Ninja 400 or Z400 from displaying errors with the included AIS circuit plug. TST Emission Block Off Kit shown installed on the 2018 Kawasaki Ninja 400. Z400 results will be extremely similar. TST Image Carousel Close

TST Emission Block Off Kit for Kawasaki Ninja 400 2018+ / Z400 2019+

The TST Emission Block Off Kit enables you to remove the air induction system (AIS) from your 2018+ Kawasaki Ninja 400 engine and seal the holes left behind. With the AIS removed you will be able to get an accurate air/fuel ratio tune and keep exhaust popping to a minimum, not to mention save a little weight and decrease engine clutter.


Kawasaki Ninja 400 | 2018, 2019, 2020

Kawasaki Z400 | 2019, 2020

This product is part of our Worx Program!

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SKU 10385
Weight 0.25 LBS
Price: $34.99
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If buying this product as part of the Buy Together bundle below, define these options there.


  • Enables accurate air/fuel ratio tuning
  • Smog block off plate features a durable black anodized finish
  • Features laser engraved TST logo
  • Manufactured from CNC machined billet aluminum
  • Removes bulky AIS system and seals inlet ports
  • Includes stainless steel installation hardware and rubber plug
  • Also includes PAIR AIS Eliminator Circuit to prevent your Ninja 400 or Z400 from displaying error codes while eliminating the valve circuitry.
  • For race applications only


If you're looking to drop some weight from your 2018+ Kawasaki Ninja 400 or 2019+ Z400 and help get the most accurate air / fuel tune, ditching the air induction system is the right move. This emissions block off plate caps the AIS system to prevent uncontrolled secondary airflow and enabling you to accurately fine tune your Kawasaki Ninja 400 / Z400. We include everything you need to accurately and correctly remove the system. We include the CNC machined block off plate which features a durable black anodized finish, rubber plug, and PAIR AIS Eliminator Circuit plug which prevents your Kawasaki from displaying errors. All of these components create an easy to use kit that completely removes your stock Kawasaki AIS system.

Please note this item is for race applications only and may not comply with the laws and regulations in your area. See our Terms & Conditions for more information.

  • TST emission block off plate
  • Stainlees steel installation hardware
  • Rubber plug
  • PAIR AIS circuit plug
  • 1 Year Warranty (See our warranty policy here)

WARNING: Cancer and Reproductive Harm -


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