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from 991 reviews
After quite possibly the longest 42 day wait of my life my complete m4 exhaust was finally in my

After quite possibly the longest 42 day wait of my life my complete m4 exhaust was finally in my possession. Worth the wait and I’d order from bills again.

Daniel Trombley
M4 Exhaust Carbon Fiber Slip-On 2017-2025 2026 Z900 KA9004
M4 Exhaust Carbon Fiber Slip-On 2017-2025 2026 Z900 KA9004
⭐️⭐️⭐️⭐️⭐️ Premium quality and perfect fit for the S1000RR

Installed on my 2025 BMW S1000RR and the fitment was absolutely perfect.

The titanium finish, weld quality, and overall construction are excellent. Sound is deeper, cleaner, and slightly louder than stock without being excessive.

After the first ride, the titanium started developing the beautiful blue heat coloration that Akrapovic is known for, which gives the exhaust an even more premium appearance.

I had previously tested an aftermarket replica, and while it was surprisingly good, the genuine Akrapovic stands out in overall refinement, finish quality, and how the titanium ages with heat cycles.

If you’re looking for an OEM-quality upgrade that complements the BMW perfectly, this exhaust is worth it.

Bill’s Exhausts also had the best price I could find, with fast shipping, no tax charged to Texas, and free shipping, making the purchase experience even better.

Highly recommended.

Francisco Pereira
AKRAPOVIC Titanium Slip-On Line Muffler S1000R / S1000RR /M 1000 RR 2020- 2026 S-B10SO11-CBT 1811-3739
AKRAPOVIC Titanium Slip-On Line Muffler S1000R / S1000RR /M 1000 RR 2020- 2026 S-B10SO11-CBT 1811-3739
Sounds amazing! Super easy

Sounds amazing! Super easy install!

Blaine Tyra
M4 Exhaust Carbon Fiber Street Slayer Slip On 2006-2007 GSXR 600/750 SU6824
M4 Exhaust Carbon Fiber Street Slayer Slip On 2006-2007 GSXR 600/750 SU6824
Sounds

Sounds great

Anonymous
Graves Motorsports Zx-6r Cat-Back Slip-On Carbon Exhaust 2019-2025 2026 Exk-19zx6-Cbtc
Graves Motorsports Zx-6r Cat-Back Slip-On Carbon Exhaust 2019-2025 2026 Exk-19zx6-Cbtc
Quick and easy install no modifications required.

These pipes are great! Very light compared to oem, around 30 minute install, andall parts fit perfectly. I also installed an arrow muffler, sounds great! Noticeable power improvement even without tuning.

Brandon M.
Arrow Yamaha XT1200Z Super Tenere Exhaust Collector Pipes for ARROW slip-on stainless steel 72095PD
Arrow Yamaha XT1200Z Super Tenere Exhaust Collector Pipes for ARROW slip-on stainless steel 72095PD
Sounds incredible

Bill’s Exhaust was super efficient with shipping. The exhaust sounds loud and incredible, much better than any videos I’ve seen on it. Install was easy enough. My bike’s a 2025 Honda Rebel 1100T and I needed to reuse the original gasket. To me, it looks amazing. Love it!

Anonymous
VANCE & HINES Hi-Output Slip-On Muffler 48427
VANCE & HINES Hi-Output Slip-On Muffler 48427
Gorgeous exhaust and performance exceptional

Gorgeous exhaust goes with the lines of the bike perfect performance the carbon is beautiful. Bill has always provided excellent service highly recommend Bill exhaust .

Luis Perez
LEOVINCE LV Pro Muffler 14344E
LEOVINCE LV Pro Muffler 14344E
Awesome Upgrade!

The LV-10 was just what I was looking for in a slip-on. Minimalist design, easy installation, and added just the amount of growl to the exhaust without being obnoxious. It also keeps me inside some of the crazy exhaust and noise laws in New York. Bills Exhaust had the unit shipped to me in a few days. Installed onto a 2025 Monster 937+

David Ech
LEOVINCE LV-10 Slip-On Muffler - Black Ducati Monster 937 2021-2023 15260B 1811-4426
LEOVINCE LV-10 Slip-On Muffler - Black Ducati Monster 937 2021-2023 15260B 1811-4426
Perfect fit

Perfect fit, look and performance

Brad Hahn
71925AK Arrow Maxi Race-Tech Slip-on Exhaust, Aluminum for BMW R1250R/RS 19-20
71925AK Arrow Maxi Race-Tech Slip-on Exhaust, Aluminum for BMW R1250R/RS 19-20
Perfect

Perfect, head turner in the streets

Jordan Hoffman
71069PR Arrow CBR650R /CB 650 R 2024- 2025 2026 Pro-Race Racing Full Exhaust TITANIUM PRO-RACE SILENCER + STAINLESS STEEL COLLECTORS
71069PR Arrow CBR650R /CB 650 R 2024- 2025 2026 Pro-Race Racing Full Exhaust TITANIUM PRO-RACE SILENCER + STAINLESS STEEL COLLECTORS
Sounds great!

Fits well, easy to install, great weight reduction, looks and sounds great!

Glenn Kunkel
Arrow Husqvarna 701 Enduro/Supermoto E5+ '25/'26 Full System With Explorer Titanium Exhaust - 72669pk
Arrow Husqvarna 701 Enduro/Supermoto E5+ '25/'26 Full System With Explorer Titanium Exhaust - 72669pk
EXCELENTE EL PRODUCTO

EXCELENTE EL PRODUCTO QUE SOLICITE LLEGO EN TIEMPO Y FUNCIONA A LA PERFECCION

Anonymous
VANCE & HINES Fuelpak 4 Tuning Module 4 for Harley-Davidson Dyna/Softail/Sportster/Touring/Trike 2011-2020 Gray 6-pin CAN bus 66045
VANCE & HINES Fuelpak 4 Tuning Module 4 for Harley-Davidson Dyna/Softail/Sportster/Touring/Trike 2011-2020 Gray 6-pin CAN bus 66045
New 2026 Indian 101 Scout comes loaded but the factory exhaust is a sleeper

New 2026 Indian 101 Scout comes loaded but the factory exhaust is a sleeper. Well, the V&H HO woke that bugger up! Shifting far smoother, revs up faster and it now sounds like 1250engine. Took minutes to install. Mahalo to Bill's for USPS shipping to Hawaii ($20 instead of $200), much ALOHA being sent your way.

Douglas Mallardi
VANCE & HINES Hi-Output Slip-On Muffler - Black - Indian Scout 2025 48627
VANCE & HINES Hi-Output Slip-On Muffler - Black - Indian Scout 2025 48627
Digging the Arrows

First time trying Arrow Exhaust. I was an Akrapovic fan boy. I’m happy with their quality and sound. Fitment is perfect. They don’t come with a bracket for the side panels but it looks fine without them (HyperMotard 950). They sound great. Classic deep tone without that bubbly idle noise more open exhausts have. Proper bark up high. A bit louder than the stock cans at all revs but never annoying and very quiet with neutral throttle. There’s a little decel popping with the stock map and valve disabled. They look great. First time shopper at Bill’s and everything went as expected. Shipping time and delivery was right when they said it would be. Good communication and packaging. Awesome all around.

Pat Carroll
Arrow Ducati Hypermotard 950 2019 Homologated Pro-Race Nichrom Dark Rh+Lh Silencers With Welded Link Pipe 71895prn
Arrow Ducati Hypermotard 950 2019 Homologated Pro-Race Nichrom Dark Rh+Lh Silencers With Welded Link Pipe 71895prn
Pure craftsmanship and quality

I know there was a lead time on this M4 exhaust but bill’s got it to me before it was supposed to be here can’t say enough about there company thank you so much. The craftsmanship and quality are spot on. I will always buy from them.

David Reese
M4 Exhaust GP19 Black Slip On 2009 - 2025 2026 ZX6R zx6 KA6922-GP19
M4 Exhaust GP19 Black Slip On 2009 - 2025 2026 ZX6R zx6 KA6922-GP19
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