M4 Exhaust

¥300 off

M4 Q3 Stage 2 Quiet Insert

Sale price ¥6,400 JPY Regular price ¥6,700

Very low stock (1 unit)
¥4,500 off
M4 slip-on with X96 carbon fiber canister and carbon fiber heat guard 2023- 2025 Kawasaki ZX-4RR KA4414

(1)

Sale price ¥86,900 JPY Regular price ¥91,400
¥9,300 off
M4 full system stainless steel with street slayer carbon fiber X96 canister 2023- 2025 Kawasaki ZX-4RR KA4434

Sale price ¥176,800 JPY Regular price ¥186,100
¥1,100 off
M4 Exhaust Muffler Box Eliminator Kit 2018 - 2023 790/890 Duke, Adventure CE-KT1

Sale price ¥19,900 JPY Regular price ¥21,000
¥4,100 off
M4 Exhaust Stainless steel slip-on with titanium canister. 2018 - 2022 790 Duke KT1016

Sale price ¥78,000 JPY Regular price ¥82,100
¥4,100 off
M4 Exhaust Tech One Carbon Fiber Slip On 2015-2016 S1000RR BM9124

Sale price ¥77,900 JPY Regular price ¥82,000
¥3,000 off
M4 Exhaust GP19 Black Slip On 2020-2025 S1000RR BM9132-GP19

Sale price ¥58,900 JPY Regular price ¥61,900
¥4,100 off
M4 Exhaust Tech One Carbon Slip On 2020-2025 S1000RR BM9134

Sale price ¥77,900 JPY Regular price ¥82,000
¥6,300 off
M4 Exhaust Stainless Steel Header Kit 2020-2024 S1000RR BM9100

(1)

Sale price ¥119,300 JPY Regular price ¥125,600
IN STOCK M4 Exhaust Carbon Fiber Slip On 2015-2020 FZ-07 / MT-07 YA6714

Regular price ¥74,400 JPY

Very low stock (1 unit)
¥3,900 off
M4 Exhaust Carbon Fiber Slip On 2016-2021 XSR900 YA6912

Sale price ¥73,600 JPY Regular price ¥77,500
¥1,800 off
M4 Exhaust Catalytic Converter Eliminator 2009-2014 R1 YA-CEKR109

Sale price ¥35,300 JPY Regular price ¥37,100
¥8,900 off
M4 Exhaust Undertail CAT Eliminator Slip-On with Titanium Canisters 2009-2014 R1 YA9936

Sale price ¥169,100 JPY Regular price ¥178,000
¥8,900 off
M4 Exhaust CAT Eliminator Slip-On with Carbon Fiber Canisters 2009-2014 R1 YA9934

Sale price ¥169,100 JPY Regular price ¥178,000
¥6,600 off
M4 Exhaust Undertail Carbon Fiber Slip Ons 2009-2014 R1 YA9924

Sale price ¥125,900 JPY Regular price ¥132,500
¥800 off
IN STOCK M4 Exhaust Carbon Fiber Heat Shield 2015-2025 R1 HG-YAR115

Sale price ¥14,600 JPY Regular price ¥15,400

Very low stock (1 unit)
¥4,400 off
M4 Exhaust Catalytic Converter Elim. Kit - Titanium 2015-2024 R1 YA-CEKR115-Ti

Sale price ¥82,100 JPY Regular price ¥86,500
M4 Exhaust BLACK CAT ELIMINATOR 2015-2024 R1 YA-CEKR115

(1)

Regular price ¥48,800 JPY
¥6,700 off
M4 Exhaust Street Slayer Carbon Fiber Slip On 2015-2025 R1 YA9944

Sale price ¥126,300 JPY Regular price ¥133,000
¥5,200 off
M4 Exhaust RM1 Black Slip On w/ black Cat. Eliminator 2015-2025 R1 YA9942-CE

(1)

Sale price ¥100,300 JPY Regular price ¥105,500
¥2,900 off
M4 Exhaust RM1 Black Slip On 2015-2025 R1 YA9942

Sale price ¥54,700 JPY Regular price ¥57,600
¥5,000 off
M4 Exhaust GP2 Black Slip On w/ Cat. Eliminator 2015-2025 R1 YA9922GP-CE

(1)

Sale price ¥93,600 JPY Regular price ¥98,600
¥2,500 off
M4 Exhaust GP2 Black Slip On 2015- 2022 R1 YA9922-GP

Sale price ¥47,500 JPY Regular price ¥50,000
¥2,400 off
M4 Exhaust Polished Slip On 2003-2005 R6 YA6312

Sale price ¥46,500 JPY Regular price ¥48,900
¥4,200 off
M4 Exhaust Carbon Fiber Street Slayer Slip On w/ Muller Box Elim. 2006-2020 R6 YA6624-MBE

Sale price ¥79,200 JPY Regular price ¥83,400
¥3,300 off
M4 Exhaust Carbon Fiber Street Slayer Slip On 2006-2020 R6 YA6624

Sale price ¥63,100 JPY Regular price ¥66,400
¥2,300 off
M4 Exhaust GP Black Slip On 2006-2020 R6 YA6622

Sale price ¥44,100 JPY Regular price ¥46,400
¥5,700 off
M4 Exhaust Full System Titanium Canister 2015-2024 R3/MT-03 YA3026

Sale price ¥108,100 JPY Regular price ¥113,800
¥5,700 off
M4 Exhaust Full System Carbon Fiber Canister 2015-2024 R3 YA3024

Sale price ¥108,100 JPY Regular price ¥113,800
¥4,100 off
IN STOCK M4 Exhaust Carbon Fiber Slip-On 2017-2025 Z900 KA9004

(1)

Sale price ¥78,000 JPY Regular price ¥82,100

In stock (8 units)
IN STOCK M4 Exhaust Header Kit 2017-2025 Z900 KA9000

(4)

Regular price ¥101,000 JPY

In stock (5 units)
Sold out
¥5,000 off
M4 Exhaust Black Retro-Drag Slip Ons 2008-2011 ZX14 KA9822

Sale price ¥96,000 JPY Regular price ¥101,000
¥7,200 off
M4 Exhaust MC36 Carbon Fiber Slip Ons 2012-2025 ZX14 KA9424

Sale price ¥137,600 JPY Regular price ¥144,800
¥3,000 off
M4 Exhaust GP Black Slip On 2008-2010 ZX10 KA9722-GP

Sale price ¥56,900 JPY Regular price ¥59,900
M4 Exhaust Street Slayer Carbon Slip On 2008-2010 ZX10 KA9734

Regular price ¥66,400 JPY
¥3,600 off
M4 Exhaust Street Slayer Slip-On System with Titanium Canister 2011-2015 ZX10 KA9926

Sale price ¥69,500 JPY Regular price ¥73,100
¥1,000 off
M4 Exhaust Universal Catalytic Converter Eliminator 2016-2020 ZX10 CE-KAZX10R-16SS

Sale price ¥19,100 JPY Regular price ¥20,100
¥11,800 off
M4 Exhaust Full Titanium System Black GP19 2016-2020 ZX10 KA9922-GP19T

Sale price ¥223,300 JPY Regular price ¥235,100
¥8,300 off
M4 Exhaust Full System Black GP19 2016-2020 ZX10 KA9922-GP19

Sale price ¥157,700 JPY Regular price ¥166,000
¥3,000 off
M4 Exhaust Street Slayer Carbon Fiber Slip On 2016-2020 ZX10 KA9944

Sale price ¥58,900 JPY Regular price ¥61,900
¥1,600 off
M4 Exhaust Universal Catalytic Converter Eliminator 2021-2025 ZX10R CE-KAZX10R-21SS

(1)

Sale price ¥29,500 JPY Regular price ¥31,100
¥13,800 off
M4 Exhaust Full Titanium System Tech 1 Carbon Fiber ZX10R 2021-2025 KA9954T

Sale price ¥262,100 JPY Regular price ¥275,900
¥11,800 off
M4 Exhaust Full Titanium System Black GP19 ZX10R 2021-2025 KA9932-GP19T

Sale price ¥223,300 JPY Regular price ¥235,100
¥8,700 off
M4 Exhaust Full System Black GP19 ZX10R 2021-2025 KA9932-GP19

(1)

Sale price ¥165,600 JPY Regular price ¥174,300
¥9,700 off
M4 Exhaust Full System Tech 1 Carbon Fiber 2021-2025 ZX10R KA9954

Sale price ¥183,800 JPY Regular price ¥193,500
¥8,000 off
M4 Exhaust Full System StreetSlayer with Titanium Canister 2009 - 2025 ZX6R KA6996

Sale price ¥151,400 JPY Regular price ¥159,400
¥9,300 off
KA6984 2009 - 2024 - 2025 ZX6R ZX-6R M4 Exhaust Full System Tech 1 Carbon Fiber

(2)

Sale price ¥176,800 JPY Regular price ¥186,100
¥2,900 off
M4 Exhaust GP Black Slip On 2009-2011 Ninja 650 KA6612-GP

Sale price ¥55,900 JPY Regular price ¥58,800
¥3,200 off
M4 Exhaust Titanium Slip On 2013-2017 Ninja 300 KA3016

Sale price ¥60,800 JPY Regular price ¥64,000
¥3,600 off
M4 Exhaust Carbon Fiber Slip On 2013-2017 Ninja 300 KA3014

Sale price ¥69,500 JPY Regular price ¥73,100

Let customers speak for us

from 627 reviews

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

IN STOCK Vandemon Ducati XDiavel & Diavel S 1260 Vandemon Titanium Exhaust System 2016-22 SKU: DUCDVLTITANEXHA VA-9

Excellent

William OGorman

10/16/2025

FEULING OIL PUMP CORP. Race Series Camshaft Kit - 521 Series 7262ST

Perfect fit

Perfect fit.

Robert W Johnson

10/09/2025

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

Highly recommend

Came in just 4 week to Canada couldn’t be more happy with the overall sound and fit the pipe cleans the bike up so much

GixxerZen

10/07/2025

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

Amazing piece

Amazing piece, pro shade lens is a game changer. Looks super sharp too. Beautiful!

Alexander Au

10/05/2025

ARAI Vas-V Pro Shade Lens - Red Mirror 011075

Box arrived damaged from UPS but because of the great packaging it was un-damaged. Fit perfectly on the bike.

Steven Langen

10/03/2025

IN STOCK 71776MI Arrow Racing Link Pipe, Stainless Steel for BMW F750GS/850GS/ 2021-2025 F 900 GS / F 900 GS Adventure ’24/25

Love it

Love it, love the sound, way lighter than stock exhaust.

Benjamin Bradley

10/01/2025

Graves Slip-on titanium exhaust CRF450RL/ L / LX 2019-2025 EXH-19C4X-SOT

Great exhaust

Great exhaust. Great feedback from Bill’s Exhausts, would order from here again.

Lawson Leatherwood

Austin Racing GP1R YAMAHA 2021-2025 MT09/FZ09 GP3 BOX DELETE RACE EXHAUST SYSTEM AR68

Sounds amazing! And came right in time before GAT

Sounds amazing! And came right in time before GAT. great customer service as well.

kawasakik4

09/25/2025

The Arrow Exhaust System I bought for my Tiger 900 Rally Pro is exactly what I was looking for

The Arrow Exhaust System I bought for my Tiger 900 Rally Pro is exactly what I was looking for. Lightweight, looks great, and sounds amazing!

Michael Leon

09/23/2025

72006VAN Arrow Veloce RACING Slip-on Exhaust, Aluminum Dark for Triumph Tiger 900 24-25

I love the Titanium Exhaust Manifold on my 2024 Rocket 3 GT

I love the Titanium Exhaust Manifold on my 2024 Rocket 3 GT, The fit was perfect and look was just as good. The true beauty is how it blued & red coloration after the first few heat cycles. The carbon fiber shields are a great touch but the fit and finish are fantastic. The bike looks great and performance is even better.

Andrew Herold

09/20/2025