COMETIC

COMETIC Valve Stem Seal - .625" C9998-1

Regular price ¥800 JPY

In stock (20 units)
COMETIC Top End Gasket Kit - Buell C10111

Regular price ¥22,600 JPY

In stock (6 units)
COMETIC Complete Gasket Kit - Big Twin C10112

Regular price ¥33,200 JPY

In stock (11 units)
COMETIC Complete Gasket Kit - Big Twin C10113

Regular price ¥33,200 JPY

Low stock (4 units)
Sold out

COMETIC Top End Gasket Kit - Buell C10115

Regular price ¥22,600 JPY
Sold out

COMETIC Complete Gasket Kit - Big Twin C10118

Regular price ¥31,600 JPY
¥1,900 off

COMETIC Breather Gasket - Big Twin C10114

Sale price ¥500 JPY Regular price ¥2,400

In stock (39 units)
COMETIC Motor Gasket Kit - Big Twin C10119

Regular price ¥25,200 JPY

Very low stock (1 unit)
COMETIC Head Gasket - Big Twin C10120

Regular price ¥9,800 JPY

Low stock (3 units)
COMETIC Inner Push Pins Gasket C10122

Regular price ¥2,700 JPY

In stock (57 units)
COMETIC Complete Gasket Kit - Big Twin C10121-036

Regular price ¥26,700 JPY

Very low stock (1 unit)
Sold out

COMETIC Complete Gasket Kit - Big Twin C10123

Regular price ¥43,200 JPY
COMETIC Complete Gasket Kit - Big Twin C10121

Regular price ¥26,700 JPY

Very low stock (1 unit)
COMETIC Case Saver Gasket C10125

Regular price ¥8,300 JPY

Low stock (4 units)
COMETIC Complete Gasket Kit - Big Twin C10123-030

Regular price ¥45,400 JPY

In stock (5 units)
COMETIC Engine Gasket Kit - Iron XL C9049F

Regular price ¥24,400 JPY

In stock (9 units)
COMETIC Engine Gasket Kit - Iron XL C9051F

Regular price ¥27,900 JPY

Low stock (4 units)
Sold out

COMETIC Top End Gasket Kit - 883 C9192

Regular price ¥36,300 JPY
COMETIC Primary Gasket Kit C9125

Regular price ¥6,800 JPY

In stock (330 units)
COMETIC Engine Gasket Kit - EVO/XL C9191

Regular price ¥45,300 JPY

In stock (71 units)
COMETIC Engine Gasket Kit - EVO/XL C9193

Regular price ¥45,300 JPY

In stock (23 units)
COMETIC Top End Gasket Kit - 883 C9194

Regular price ¥36,300 JPY

Very low stock (1 unit)
COMETIC Primary Gasket Kit C9211

Regular price ¥9,000 JPY

In stock (485 units)
COMETIC Primary Gasket Kit C9210

Regular price ¥9,000 JPY

In stock (70 units)
COMETIC Primary Gasket C9309F1

Regular price ¥7,200 JPY

In stock (1071 units)
COMETIC Primary Gasket - Softail C9607F1

Regular price ¥7,200 JPY

In stock (109 units)
Sold out

COMETIC Oil Pan Gasket - Twin Cam C9646F1

Regular price ¥2,200 JPY
COMETIC Engine Gasket Kit - EVO/XL C9755F

Regular price ¥40,600 JPY

In stock (47 units)
Sold out

COMETIC Oil Pan Gasket - Twin Cam C9647F1

Regular price ¥2,200 JPY
Sold out

COMETIC Top End Gasket Kit - Twin Cooled - .040" C10138

Regular price ¥29,000 JPY
COMETIC Top End Gasket Kit - Twin Cam C9949

Regular price ¥24,200 JPY

In stock (49 units)
COMETIC Coolant Tube O-Ring Set C10139

Regular price ¥5,000 JPY

In stock (18 units)
Sold out

COMETIC Top End Gasket Kit - Twin Cooled - .030" C10138-030

Regular price ¥29,000 JPY
Sold out

COMETIC Top End Gasket Kit - Twin Cam C9949-030

Regular price ¥23,200 JPY
COMETIC Base Seal Gasket C10127

Regular price ¥1,800 JPY

In stock (20 units)
COMETIC Complete Gasket Kit - 110" C10128

Regular price ¥26,700 JPY

Low stock (2 units)
COMETIC Complete Gasket Kit - 110" C10128-040

Regular price ¥26,700 JPY

In stock (8 units)
COMETIC Push Rod Gasket Kit - XL C10133

Regular price ¥3,200 JPY

In stock (10 units)
Sold out

COMETIC Cylinder Head/Base Gasket - Big Bore - XG750 C10137-HB

Regular price ¥11,700 JPY
COMETIC Derby Gasket C10140F1

Regular price ¥1,800 JPY

In stock (626 units)
COMETIC Complete Gasket Kit - Buell C10142

Regular price ¥45,600 JPY

Very low stock (1 unit)
Sold out
¥400 off

COMETIC Cylinder Head/Base Gasket - XG750 C10136-HB

Sale price ¥11,300 JPY Regular price ¥11,700
COMETIC Derby Gasket C10140F5

Regular price ¥1,500 JPY

In stock (457 units)
Sold out

COMETIC Primary Gasket C10145F5

Regular price ¥22,400 JPY
COMETIC Cam Cover Gasket C10146F1

Regular price ¥2,900 JPY

In stock (13 units)
Sold out

COMETIC Primary Gasket C10145F1

Regular price ¥5,300 JPY
Sold out

COMETIC Clutch Cover Gasket C10147F1

Regular price ¥1,800 JPY
COMETIC Cam Cover Gasket C10146F5

Regular price ¥13,100 JPY

Low stock (3 units)
Sold out

COMETIC Clutch Cover Gasket C10147F5

Regular price ¥6,000 JPY
Sold out

COMETIC Primary Gasket Kit C10148

Regular price ¥9,000 JPY

Let customers speak for us

from 669 reviews

Will Be Back!

I recently purchased the Arrow Race-Tech Slip-On Exhaust (Aluminum Dark) for my Kawasaki Z900 (’17–’24), and I couldn’t be happier. The quality is top-tier—lightweight, beautifully finished, and it gives the bike the deep, aggressive sound it should’ve had from the factory. Throttle response feels smoother, and the overall riding experience is noticeably more exciting.

Huge shoutout to Bill from Bills Exhaust. His communication was excellent from start to finish—quick replies, honest info, and genuinely great customer service. The exhaust shipped fast with no delays, no issues, and no backorder nonsense. Exactly what you want when ordering parts for your bike.

If you’re on the fence, go for it. The exhaust is incredible, and Bill makes the whole process even better. Highly recommend!

Brian Brayley

12/01/2025

71856AKN Arrow Race-Tech Slip-on Exhaust, Aluminum Dark for Kawasaki Z900 17-24

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