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KAWASAKI Z900 2017-2025 : GP1 DE-CAT SYSTEM

$1,879.00 – $2,049.00

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Choose the perfect muffler tip to complement your exhaust system. Each tip is meticulously crafted to deliver both performance and aesthetics, with a variety of materials and finishes to suit your style and bike specifications.

– GP1R features a 60mm bore angular tip and is available in Black Aluminum Billet or Pure Titanium Billet.
– GP1RS offers a 50mm bore angular tip, also crafted from Black Aluminum Billet or Pure Titanium Billet.
– GP2R/GP2 is designed with a titanium welded tip for durability and a sleek finish.
– V3 Mini provides a 60mm bore angular tip, made from machined Aluminum Billet in Champagne or Black, or from machined Pure Titanium Billet.
– V3 includes a 60mm bore angular tip, crafted exclusively from machined Black Aluminum Billet.

Note: Not all options are applicable for every model bike. Please hover over image to confirm compatibility with your specific model before making a selection.

Please choose your preferred design, keeping the following in mind:

Carbon Fibre: Laser etching is not possible. For GP2R, select the Standard Decal. For GP1R, choose Carbon Fibre GP1R Only.

Black Ceramic or Titanium: Select one of our laser etching options.

Not included with exhausts from 1/10/2024, even if included in the description, there is this additional fee. Descriptions are being updated currently
(Note Db Killers not available for duel or homologated pipes)

SKU: z900gp1decat Category:

Description

Kawasaki Z900 (2017–2025) GP1R, GP2R & V3 De-Cat Race Exhaust Systems

Upgrade your Kawasaki Z900 with our high-performance de-cat race exhaust systems, designed for serious riders looking for weight savings, improved power, and an aggressive MotoGP-inspired sound.

Exhaust Options:

  • GP1R: 60mm bore angular tip, available in Black or Pure Titanium.
  • GP2R: 110mm carbon-fibre can for a sleek, lightweight design.
  • V3: 150mm length can, available in Black Ceramic or Titanium.

Key Features:

✅ Significant weight reduction (just 1.5kg).
✅ Aggressive MotoGP-style sound.
✅ Eliminates the restrictive catalytic converter.
✅ Gains of 3–5 bhp without requiring a remap.
✅ Requires cutting of the stock exhaust—measurements must be checked before ordering (74mm or 79mm outer diameter at the cutting point).

Noise Levels (Tested at 5500 RPM):

  • GP1R Can: 103dB (with dB killer) / 106dB (without).
  • GP2R Can: 103dB (with dB killer) / 106dB (without).

Important Notes:

Road Use: Non-homologated exhaust systems may not comply with local road regulations and are intended for race use only. Noise levels can vary significantly, from standard to extremely loud. Please review the specifications carefully before ordering. If you have any questions or need assistance, feel free to contact us.

Build Times: Our exhausts are built to order, with delivery times ranging from 6 to 10 weeks for standard systems and 10 to 15 weeks for more complex full systems. For the latest estimated delivery times, please visit Current Build Times. These timeframes reflect the handcrafted nature of our exhausts, which are produced by a small team in the UK, as well as the high demand for these limited products.

Exhaust Types:

  • Slip-On Exhausts: Replaces the original muffler, keeping the mid-section (catalytic converter) and headers.
  • De-Cat Systems: Replaces the muffler and catalytic converter while retaining OEM headers, offering weight savings and performance gains.
  • Full Systems: Complete replacement of muffler, mid-section, and headers for maximum performance.

Design Updates: As each exhaust is handmade to order, our designs are constantly evolving to incorporate improvements. As a result, the final product may vary slightly from the pictures shown. These differences are typically minor and represent our commitment to continuous enhancement.

Got questions? Need help choosing the right system? Get in touch—we’re here to help!

Additional information

Year:

2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025

Muffler Design:

GP1/R, GP2/R, V3, V3R

Muffler Material:

Carbon Fibre (Not applicable for V3), Titanium, Black Ceramic Hardcoat

Length:

GP1/R 110mm, GP2R 110mm, GP2 200mm, V3 150mm, V3 200mm, V3 250mm

Header Size (see description for more information)

74mm outer diameter, 79mm outer diameter.

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