FMF – Bill's Exhausts

$339.00 off

FMF Sunglasses Display Kit - 30 Pack F-61500-000-01 2610-1333

Sale price $2,743⁰⁰ NZD Regular price $3,082⁰⁰

In stock (19 units)
Sold out
$285.00 off
FMF Factory 4.1 RCT Exhaust - Titanium CRF250R 2018-2021 / CRF250RX 2019-2021 041590 1820-1948

Sale price $2,304⁰⁰ NZD Regular price $2,589⁰⁰
$258.00 off

FMF Factory 4.1 RCT Exhaust System - Titanium - Carbon Fiber End Cap YZ450F 2023-2025 044478

Sale price $2,084⁰⁰ NZD Regular price $2,342⁰⁰

In stock (20 units)
Sold out
$258.00 off
FMF Factory 4.1 RCT Exhaust - Titanium CRF450R/.RX 2021- 2025 041605 1820-1994

Sale price $2,084⁰⁰ NZD Regular price $2,342⁰⁰
$258.00 off

FMF 4.1 RCT Exhaust System CRF250R 2022 -2025 041613 1820-2003

Sale price $2,084⁰⁰ NZD Regular price $2,342⁰⁰

In stock (20 units)
$258.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium YZ250F/FX 2019-2025 044457 1820-1841

(1)

Sale price $2,084⁰⁰ NZD Regular price $2,342⁰⁰

In stock (20 units)
$258.00 off

FMF Factory 4.1 RCT Exhaust System - Titanium - Carbon End Cap KX450 /KX450F /KX450x 2024 -2025 042406 1820-2046

Sale price $2,084⁰⁰ NZD Regular price $2,342⁰⁰

In stock (8 units)
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$254.00 off

FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium YZ450F 2020-2022 044461 1820-1932

Sale price $2,054⁰⁰ NZD Regular price $2,308⁰⁰
Sold out
$249.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium Gas Gas/Husqvarna/KTM 250 SX-F 2019- 2022 045635 1820-1872

Sale price $2,016⁰⁰ NZD Regular price $2,265⁰⁰
$249.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium Gas Gas/Husqvarna/KTM 350 XC-F 2019-2022 045637 1820-1874

Sale price $2,016⁰⁰ NZD Regular price $2,265⁰⁰

Low stock (2 units)
Sold out
$249.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium 450 Gas Gas/Husqvarna/KTM 2019-2022 045639 1820-1876

Sale price $2,016⁰⁰ NZD Regular price $2,265⁰⁰
$229.00 off

FMF Factory 4.1 RCT Exhaust - Titanium KX250F/X 2021-2024 042398 1820-1984

Sale price $1,857⁰⁰ NZD Regular price $2,086⁰⁰

In stock (12 units)
$229.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium KX 450 F/X 2019- 2023 042373 1820-1844

Sale price $1,857⁰⁰ NZD Regular price $2,086⁰⁰

In stock (5 units)
$225.00 off
FMF Factory 4.1 RCT Exhaust - Titanium KX250F 2017-2020 042378 1820-1901

Sale price $1,819⁰⁰ NZD Regular price $2,044⁰⁰

In stock (209 units)
Sold out
$225.00 off

FMF Factory 4.1 RCT Exhaust - Titanium RMZ250 2019-2024 043375 1820-1903

Sale price $1,819⁰⁰ NZD Regular price $2,044⁰⁰
Sold out
$225.00 off

FMF FACTORY 4.1 RCT TITANIUM ANODIZED FULL SYSTEM W/ CARBON END CAP RMZ450 18-24 043367

Sale price $1,819⁰⁰ NZD Regular price $2,044⁰⁰
$220.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium Husqvarna FE 250 2020-2021 045652 1820-1956

Sale price $1,781⁰⁰ NZD Regular price $2,001⁰⁰

In stock (210 units)
$220.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium KTM 350 XCF-W 2020-2022 045653 1820-1957

Sale price $1,781⁰⁰ NZD Regular price $2,001⁰⁰

Low stock (2 units)
$220.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium Husqvarna FE 450 2020-2021 045654 1820-1958

Sale price $1,781⁰⁰ NZD Regular price $2,001⁰⁰

Low stock (2 units)
$220.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium KTM 500 XCF-W /Husqvarna FE501 2020-2022 045663 1820-1960

Sale price $1,781⁰⁰ NZD Regular price $2,001⁰⁰

Low stock (3 units)
$202.00 off

FMF Factory 4.1 RCT Exhaust System - Aluminum - Stainless Steel Header - Carbon Fiber End Cap YZ450F /FX 2023-2024 044477

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

In stock (21 units)
$202.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum YZ250F/FX 2019-2023 044456 1820-1840

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

In stock (14 units)
$202.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum YZ450F 2020-2022 044460 1820-1931

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

In stock (6 units)
Sold out
$202.00 off

FMF 4.1 RCT Exhaust with MegaBomb - Aluminum Husqvarna FE250 2020-2021 045649 1820-1953

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰
$202.00 off
FMF Factory 4.1 RCT Exhaust - Aluminum Gas Gas/Husqvarna/KTM 350 XC-W 2020-2022 045650 1820-1954

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

Very low stock (1 unit)
$202.00 off
FMF Factory 4.1 RCT Exhaust - Aluminum Husqvarna FE 450 2020-2021 045651 1820-1955

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

In stock (378 units)
$202.00 off

FMF 4.1 RCT Exhaust with MegaBomb - Aluminum KTM 500 XCF-W /Husqvarna FE 501 2020-2022 045662 1820-1959

Sale price $1,629⁰⁰ NZD Regular price $1,831⁰⁰

In stock (32 units)
Sold out
$196.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum KTM 250 SX-F 2019-2022 /Husqvarna/Gas Gas 045634 1820-1871

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰
Sold out
$196.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum KTM450 SX-F 2019-2021 /Husqvarna/Gas Gas 045638 1820-1875

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰
$196.00 off

FMF Factory 4.1 RCT Exhaust - Aluminum CRF450R/RX 2021- 2025 041604 1820-1993

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰

In stock (12 units)
$196.00 off

FMF 4.1 RCT Exhaust System CRF250R 2022 -2025 041612 1820-2002

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰

In stock (6 units)
$196.00 off

FMF Factory 4.1 RCT Exhaust System - Stainless Steel - Carbon End Cap KX 450 2024 042405

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰

Backordered
$196.00 off
FMF 4.1 Exhaust with Megabomb Header YFZ450 X/R 044438 1830-0410

Sale price $1,592⁰⁰ NZD Regular price $1,788⁰⁰

In stock (122 units)
Sold out
$190.00 off
FMF Factory 4.1 RCT Dual Mufflers - Blue Anodized CRF250R/X 2018-2021 041589 1821-1994

Sale price $1,536⁰⁰ NZD Regular price $1,726⁰⁰
Sold out
$187.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum Gas Gas/Husqvarna/KTM 350 XC-F 2019-2022 045636 1820-1873

Sale price $1,516⁰⁰ NZD Regular price $1,703⁰⁰
Sold out
$187.00 off
FMF Factory 4.1 RCT Mufflers - Anodized Titanium CRF450R/RX 2019-2020 041575 1821-1932

Sale price $1,516⁰⁰ NZD Regular price $1,703⁰⁰
$183.00 off

FMF Factory 4.1 RCT Exhaust - Aluminum KX250F/X 2021-2023 042397 1820-1985

Sale price $1,478⁰⁰ NZD Regular price $1,661⁰⁰

In stock (9 units)
Sold out
$178.00 off

FMF 4.1 RCT Exhaust with MegaBomb - Aluminum RM-Z 450 2018-2021 043366 1820-1818

Sale price $1,440⁰⁰ NZD Regular price $1,618⁰⁰
Sold out
$178.00 off
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum KX450F 2019-2023 042372 1820-1843

Sale price $1,440⁰⁰ NZD Regular price $1,618⁰⁰
Sold out
$178.00 off
FMF Factory 4.1 RCT Exhaust - Aluminum RM-Z 250 2019-2024 043374 1820-1902

Sale price $1,440⁰⁰ NZD Regular price $1,618⁰⁰
Sold out
$178.00 off

FMF 4.1 Anodized Exhaust with Powerbomb Header YFZ 450 2009-2020 044401 1830-0383

Sale price $1,440⁰⁰ NZD Regular price $1,618⁰⁰
$169.00 off

FMF 4.1 RCT Slip-On Muffler - Anodized/Titanium - Carbon Cap - Honda CRF250R/RX 2025 041619 1821-2183

Sale price $1,364⁰⁰ NZD Regular price $1,533⁰⁰

In stock (286 units)
Sold out
$169.00 off

FMF 4.1 RCT Slip-On Muffler BETA 450 RX 2024 045690 1821-2102

Sale price $1,364⁰⁰ NZD Regular price $1,533⁰⁰
$169.00 off

FMF Factory 4.1 Muffler CRF450R 2021-2024 041603 1821-2044

Sale price $1,364⁰⁰ NZD Regular price $1,533⁰⁰

In stock (812 units)
$169.00 off
FMF 4.1 RCT Slip-On Muffler CRF250R /X 2022 -2025 041611 1821-2053

Sale price $1,364⁰⁰ NZD Regular price $1,533⁰⁰

In stock (793 units)
$169.00 off

FMF Factory 4.1 RCT Slip-On Muffler - Titanium - Carbon Fiber Cap KX 450 2024 042404 1821-2094

Sale price $1,364⁰⁰ NZD Regular price $1,533⁰⁰

In stock (284 units)
Sold out
$164.00 off
FMF 4.1 Exhaust with Powerbomb Header 044213 1830-0212

Sale price $1,326⁰⁰ NZD Regular price $1,490⁰⁰
Sold out
$164.00 off

FMF 4.1 Exhaust with Powerbomb Header 044433 1830-0390

Sale price $1,326⁰⁰ NZD Regular price $1,490⁰⁰
$160.00 off

FMF Factory 4.1 RCT Muffler - Anodized Titanium KTM 350/450 SX-F 2018-2022 045629 1821-1921

Sale price $1,296⁰⁰ NZD Regular price $1,456⁰⁰

In stock (592 units)
$160.00 off

FMF Factory 4.1 RCT Muffler - Anodized Titanium KTM 250 SX-F 2019-2022 045633 1821-1925

Sale price $1,296⁰⁰ NZD Regular price $1,456⁰⁰

In stock (525 units)

Let customers speak for us

from 680 reviews

Thank you

Love my bandana

Tyrone white

12/06/2025

ZAN HEADGEAR Flydanna Head Wrap - Black Skull Paisley Z500

Incredible, the best!

Without a doubt, the best of the best, it's wonderful, it sounds incredible and the service is excellent.

Javier Villagran

12/05/2025

71207CP Arrow Competition Evo Full Titanium Exhaust for BMW S1000RR 2020-2025 / M1000RR 2020-2024

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