M4 Exhaust

Let customers speak for us

from 143 reviews

Excellent Product

I was looking for this exhaust for a long time and finally found it at bills exhaust. The exhaust sounds good! Bills exhaust did a great job from the time I ordered it until I received. Highly recommended.

Tayseer Zaid

01/03/2025

LEOVINCE LV Corsa Muffler - Black Edition KAWASAKI NINJA 400/500 2018 - 2025 15400BU 1811-4303

Excellent !!!! Exhaust !!!

First of I want to thank Bill himself for the excellent customer service and the shipping was quick. I love this M4 Dual Slip on Exhaust for my Hayabusa they definitely sound amazing and easy to install. I definitely will be buying all my products I can get from Bill for sure and definitely my to go to place to buy parts.

Michael D.

11/14/2024

M4 Exhaust Dual Carbon Tech 1 Slip Ons 2021 - 2024 Hayabusa SU8324

West Texas Heat!

I live out in West Texas halfway between Dallas and El Paso it gets hot out here.Oil works great good oil used it for years!

Jackie Williams

11/12/2024

DRAG SPECIALTIES OIL Engine Oil - 25W-60 - 1 U.S. quart 198920

Excellent product

I needed to upgrade my stock fender and didn’t want to cut wires and this product was easy to install and you use the factory license plate light without cutting wires. The installation was very easy to me. The customer service is great and also the shipping was very fast which I was impressed and definitely ordering all my parts from Bills Exhaust.

Michael D.

11/10/2024

T-rex racing suzuki hayabusa fender eliminator 2021- 2024

Empire slip on

Put this on my can am outlander 850 xmr sounds amazing deep tone love it!

Zach Thede

10/09/2024

Empire Industries Slip On Exhaust for 2012+ CAN-AM Outlander EMP-OUT-SLP

Vandemon 4-2-4 system for z900rs

Great system. Unfortunately there are no instructions whatsoever. I assumed that a clip went between the left passenger foot bracket and ended up breaking a $100 foot bracket on my motorcycle. Couldn’t believe it!!! How hard would have it been to just put a simple drawing in with the exhaust system to at least picture how it needed to be assembled. Hopefully JB Weld will glue this back together. :-(
On a brighter note, BILL’S EXHAUST STORE is absolutely awesome!!! Super customer service and Bill was really nice and kept me updated on my order the entire time. Highly recommend!!! Thank you Bill !

Marc Upchurch

10/04/2024

Vandemon Retro Stainless Steel Exhaust System Z900RS Cafe Racer 2018-24 KAWAZ900RS424SSEXHA

Awesome Grips

I bought these for my 2022 iron 883, they look and feel great. Couldn’t be happier

Colton Cofel

09/18/2024

AVON Grips - Diamond Contour - Black DIA-65-ANO

Excellent experience

Quick and timely delivery. 🏍️
The windscreen installed without issue.

Anthony Williams

06/21/2024

Zero Gravity Windscreen - Dark Smoke 20-554-19

BUY HERE!!!

Excellent service!!!

steven Diefenbacher

06/09/2024

M4 Exhaust Tech 1 Carbon Fiber Slip On 2017-2024 GSXR1000 SU9144

Pro Circuit T6

Love the sound of the new pipe and how crisp the throttle is.

John Blankenship II

05/17/2024

PRO CIRCUIT T-6 Exhaust System - Stainless Steel KX 450 2024 0122445G 1820-2042

Great service and product exactly what I ordered

Bill was awesome. He helped me be certain the part I was ordering was what I wanted. Kept me up to date on everything. Seriously, a great choice on my end. Hopefully I don’t need to replace another muffler, but if I do, I’m coming back.

Jason Bruegemann

05/04/2024

AKRAPOVIC Replacement Muffler M-AP01503C 1861-1735

Big Radius pipes

Me and neighbors absolutely enjoy Big Radius. Bill is a great guy to deal with!

Nazar Bryksa

04/28/2024

VANCE & HINES Big Radius Exhaust System - Black Softail Fat Boy 2018-2023 46375

Perfect Fit for my 2023 Streetfighter V2

A huge thanks to Bill, for keeping the communication going while the part was on its way. Bill took the time to understand what I was looking for and guided me with the purchase. I am happy with the Arrow Slip-on Exhaust. The bike sounds so much better and I can feel the performance change, also the throttle is a lot more responsive. This is an Exact Fit from Panigale V2 to Streetfighter V2. Thanks Bill.

ali waheed

04/07/2024

Arrow Panigale V2 955 2020 -2024 Racing Titanium Work Exhaust (R+L) With Welded Stainless Steel Link Pipe 71160pk

My Gen 3 Busa is now a real Jekyll & Hyde with this kit

Once again Service from Bills was spot on. Wanted a lazy point of difference on my gen 3 Busa. local supplier said 4-6 months wait in Aus it had to arrive all the way from US. Pffft, I contacted Bills and shazam it's here within 14 days. Out on the country roads, factory QS is fine but in start stop traffic around town my left ankle from a past injury reminds me of why I shouldn't be on a Busa or a sports bike. This kit integrates perfectly and seamlessly. you get the cake and eat it too. All stock QS and manual clutch operations work as per normal but add another element to my bike. I actually prefer turning QS off in Busa menu and run solely the Pingel. Affectively Its paddle shift for your bike. The supplied electronics does what it supposed to and from my experience the best settings for general and spirited riding are 80ms on the kill module. It's a luxury, sure. But one that takes my riding and cruising to another level. as stated no more than 3 hours to fit. People look at me weirdly sometimes, thinking WTF?? and often slow down. Works as it should, and Bills service as always was top notch. Thank you mate very happy once again. Keep up the great work and see on the next purchase.

Busaman

11/29/2023