Water Engine

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WSM Top End Kit - +0.75 mm - Honda 54-229-13

Regular price ¥21,900 JPY
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WSM Top End Kit - +1.00 mm - Honda 54-229-14

Regular price ¥21,900 JPY
WSM Top End Kit - +0.25 mm - Honda 54-230-11

Regular price ¥28,700 JPY

Very low stock (1 unit)
WSM Top End Kit - +0.50 mm - Honda 54-230-12

Regular price ¥28,700 JPY

Low stock (2 units)
WSM Top End Kit - +0.75 mm - Honda 54-230-13

Regular price ¥28,200 JPY

Very low stock (1 unit)
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WSM Top End Kit - +1.00 mm - Honda 54-230-14

Regular price ¥28,700 JPY
WSM Top End Kit - +0.25 mm - Honda 54-231-11

Regular price ¥28,400 JPY

Low stock (2 units)
WSM Top End Kit - +0.50 mm - Honda 54-231-12

Regular price ¥29,000 JPY

Very low stock (1 unit)
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WSM Top End Kit - +0.75 mm - Honda 54-231-13

Regular price ¥28,400 JPY
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WSM Top End Kit - Standard - Honda 54-231-10

Regular price ¥29,000 JPY
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WSM Top End Kit - +1.00 mm - Honda 54-231-14

Regular price ¥28,400 JPY
WSM Top End Kit - +0.25 mm - Kawasaki 54-250-11

Regular price ¥20,300 JPY

Low stock (2 units)
WSM Top End Kit - +0.50 mm - Kawasaki 54-250-12

Regular price ¥20,300 JPY

Low stock (2 units)
WSM Top End Kit - Standard - Kawasaki 54-250-10

Regular price ¥20,300 JPY

Low stock (3 units)
WSM Top End Kit - Standard - Kawasaki 54-252-10

Regular price ¥20,300 JPY

Very low stock (1 unit)
WSM Top End Kit - +0.25 mm - Kawasaki 54-252-11

Regular price ¥19,900 JPY

Very low stock (1 unit)
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WSM Top End Kit - +0.75 mm - Kawasaki 54-250-13

Regular price ¥19,900 JPY
WSM Top End Kit - +0.50 mm - Kawasaki 54-252-12

Regular price ¥19,900 JPY

Low stock (4 units)
WSM Top End Kit - +1.00 mm - Kawasaki 54-250-14

Regular price ¥19,900 JPY

Very low stock (1 unit)
WSM Top End Kit - +1.00 mm - Kawasaki 54-252-14

Regular price ¥20,300 JPY

Low stock (4 units)
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WSM Top End Kit - Standard - Kawasaki 54-255-10

Regular price ¥20,300 JPY
WSM Top End Kit - +0.50 mm - Kawasaki 54-255-12

Regular price ¥20,300 JPY

Very low stock (1 unit)
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WSM Top End Kit - +0.75 mm - Kawasaki 54-252-13

Regular price ¥20,300 JPY
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WSM Top End Kit - +0.25 mm - Kawasaki 54-255-11

Regular price ¥20,300 JPY
WSM Top End Kit - +0.75 mm - Kawasaki 54-255-13

Regular price ¥19,900 JPY

Low stock (2 units)
WSM Top End Kit - +1.00 mm - Kawasaki 54-255-14

Regular price ¥20,300 JPY

Low stock (2 units)
WSM Top End Kit - Standard - Kawasaki 54-255-20

Regular price ¥21,100 JPY

Low stock (3 units)
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WSM Top End Kit - +0.25 mm - Kawasaki 54-255-21

Regular price ¥20,700 JPY
WSM Top End Kit - +0.50 mm - Kawasaki 54-255-22

Regular price ¥20,700 JPY

Very low stock (1 unit)
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WSM Top End Kit - +0.75 mm - Kawasaki 54-255-23

Regular price ¥20,700 JPY
WSM Top End Kit - Standard - Kawasaki 54-257-10

Regular price ¥22,100 JPY

Low stock (2 units)
WSM Top End Kit - +1.00 mm - Kawasaki 54-255-24

Regular price ¥20,700 JPY

Low stock (2 units)
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WSM Top End Kit - +0.50 mm - Kawasaki 54-257-12

Regular price ¥22,100 JPY
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WSM Top End Kit - +0.75 mm - Kawasaki 54-257-13

Regular price ¥21,700 JPY
WSM Top End Kit - +0.25 mm - Kawasaki 54-257-11

Regular price ¥22,100 JPY

Very low stock (1 unit)
¥900 off

WSM Top End Kit - +0.25 mm - Kawasaki 54-258-11

Sale price ¥43,800 JPY Regular price ¥44,700

Very low stock (1 unit)
¥900 off

WSM Top End Kit - +0.50 mm - Kawasaki 54-258-12

Sale price ¥43,800 JPY Regular price ¥44,700

Very low stock (1 unit)
WSM Top End Kit - +1.00 mm - Kawasaki 54-257-14

Regular price ¥21,700 JPY

Very low stock (1 unit)
¥900 off
WSM Top End Kit - Standard - Kawasaki 54-258-10

Sale price ¥43,800 JPY Regular price ¥44,700

Low stock (3 units)
¥900 off

WSM Top End Kit - +1.00 mm - Kawasaki 54-258-14

Sale price ¥43,800 JPY Regular price ¥44,700

Very low stock (1 unit)
WSM Top End Kit - +0.25 mm - Kawasaki 54-256-11

Regular price ¥43,800 JPY

Low stock (2 units)
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¥1,700 off

WSM Top End Kit - +0.75 mm - Kawasaki 54-258-13

Sale price ¥43,000 JPY Regular price ¥44,700
WSM Top End Kit - Standard - Kawasaki 54-256-10

Regular price ¥43,800 JPY

Low stock (2 units)
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WSM Top End Kit - +0.50 mm - Kawasaki 54-256-12

Regular price ¥43,800 JPY
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WSM Top End Kit - +1.00 mm - Kawasaki 54-256-14

Regular price ¥43,000 JPY
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WSM Top End Kit - +0.75 mm - Kawasaki 54-256-13

Regular price ¥43,000 JPY
WSM Top End Kit - Standard - Polaris 54-311-10

Regular price ¥29,800 JPY

Low stock (3 units)
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WSM Top End Kit - +1.00 mm - Polaris 54-311-14

Regular price ¥29,800 JPY
WSM Top End Kit - +0.25 mm - Polaris 54-311-11

Regular price ¥29,800 JPY

Very low stock (1 unit)
WSM Top End Kit - +0.75 mm - Polaris 54-311-13

Regular price ¥29,800 JPY

Low stock (2 units)

Let customers speak for us

from 668 reviews

Arrived super quick

Arrived super quick, no complaints

Anonymous

11/20/2025

IN STOCK M4 Exhaust GP Black Slip on GSXR600/750 2011-2025 SU6112-GP

Great customer support

Great customer support, fast shipping and delivery , and great quality exhaust . Sounds nice 👍🏼 would definitely recommend

Atticus

11/13/2025

IN STOCK M4 Exhaust GP19 Black Slip On 2009 - 2025 2026 ZX6R zx6 KA6922-GP19

Fast service and the pipe is very well made

Fast service and the pipe is very well made.

72188PD Arrow H.D.1250 Pan America 20-25 Racing St. Steel De-Catalyzed Collector

Purchased the power core 4 along with the mega bomb header

Purchased the power core 4 along with the mega bomb header. Sounds great! Looks even better! Slammed them both on my 22’ KX 250f.

ROBERT T CLARK

11/11/2025

FMF Powercore 4 Muffler KX250F/X 2021-2023 042392 1821-2038

Was trying to find a reseller for Graves products. Stumbled upon this site. No hassles. Ships to Australia (big plus). Now I can mod my dream bike.
Exhaust is gnarly, obnoxious... exactly what I want! Makes all the right sounds.
I'd buy another one if I had another bike.
Super easy fitment, shaved off so much weight with the titanium build.
Absolute piece of art.

Nazzy

11/05/2025

Bill's Exhausts

Great price and amazing sound

Great price and amazing sound.

Michael Adams

10/27/2025

AKRAPOVIC Carbon Fiber Muffler NINJA 400 /500 2018-2025 S-K4SO6-APC 1811-3515

This system with a BT Moto tune sounds and feels amazing

This system with a BT Moto tune sounds and feels amazing. The weight reduction, power increase makes this bike handle even better.
The titanium exhaust system looks amazing.

Lou D

10/19/2025