PROX – Page 4 – Bill's Exhausts

PROX Piston Kit 01.1225.B

Regular price $160⁰⁰ AUD

Low stock (3 units)
PROX Piston Kit 01.1225.C

Regular price $160⁰⁰ AUD

Very low stock (1 unit)
PROX Piston Kit 01.4325.B

Regular price $211⁰⁰ AUD

Low stock (2 units)
Sold out

PROX Piston Kit 01.4325.C

Regular price $211⁰⁰ AUD
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PROX Piston Kit 01.4325.D

Regular price $209⁰⁰ AUD
$28.00 off

PROX Piston Kit 01.2435.B

Sale price $295⁰⁰ AUD Regular price $323⁰⁰

In stock (82 units)
$28.00 off

PROX Piston Kit 01.2435.A

Sale price $295⁰⁰ AUD Regular price $323⁰⁰

In stock (7 units)
$25.00 off

PROX Piston Kit 01.1414.A

Sale price $295⁰⁰ AUD Regular price $320⁰⁰

In stock (43 units)
$25.00 off

PROX Piston Kit 01.1414.B

Sale price $295⁰⁰ AUD Regular price $320⁰⁰

In stock (7 units)
$28.00 off

PROX Piston Kit 01.2435.C

Sale price $295⁰⁰ AUD Regular price $323⁰⁰

Very low stock (1 unit)
$12.00 off

PROX Piston Kit 01.2020.250

Sale price $151⁰⁰ AUD Regular price $163⁰⁰

In stock (29 units)
PROX Piston Kit 01.3180.050

Regular price $136⁰⁰ AUD

In stock (7 units)
PROX Piston Kit 01.3180.000

Regular price $136⁰⁰ AUD

Low stock (3 units)
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PROX Piston Kit 01.3180.100

Regular price $126⁰⁰ AUD
$12.00 off

PROX Piston Kit 01.1111.B

Sale price $136⁰⁰ AUD Regular price $148⁰⁰

In stock (8 units)
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PROX Piston Kit 01.3180.150

Regular price $126⁰⁰ AUD
$20.00 off
PROX Piston Kit 01.1338.A

Sale price $280⁰⁰ AUD Regular price $300⁰⁰

In stock (10 units)
$12.00 off

PROX Piston Kit 01.1111.C

Sale price $136⁰⁰ AUD Regular price $148⁰⁰

In stock (11 units)
$20.00 off

PROX Piston Kit 01.1338.B

Sale price $280⁰⁰ AUD Regular price $300⁰⁰

In stock (33 units)
$20.00 off

PROX Piston Kit 01.1338.C

Sale price $280⁰⁰ AUD Regular price $300⁰⁰

Low stock (4 units)
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$34.00 off
PROX Piston Kit 01.1339.A

Sale price $280⁰⁰ AUD Regular price $314⁰⁰
$29.00 off

PROX Piston Kit 01.2406.C

Sale price $271⁰⁰ AUD Regular price $300⁰⁰

In stock (16 units)
$34.00 off

PROX Piston Kit 01.1339.B

Sale price $280⁰⁰ AUD Regular price $314⁰⁰

In stock (6 units)
$6.00 off

PROX Piston Kit 01.3338.A

Sale price $271⁰⁰ AUD Regular price $277⁰⁰

Low stock (3 units)
$30.00 off

PROX Piston Kit 01.2427.C

Sale price $280⁰⁰ AUD Regular price $310⁰⁰

Low stock (2 units)
$6.00 off

PROX Piston Kit 01.3338.B

Sale price $271⁰⁰ AUD Regular price $277⁰⁰

Very low stock (1 unit)
$10.00 off

PROX Piston Kit 01.3410.B

Sale price $286⁰⁰ AUD Regular price $296⁰⁰

Very low stock (1 unit)
$10.00 off

PROX Piston Kit 01.3410.C

Sale price $286⁰⁰ AUD Regular price $296⁰⁰

Very low stock (1 unit)
$6.00 off
PROX Piston Kit 01.4337.A

Sale price $271⁰⁰ AUD Regular price $277⁰⁰

In stock (7 units)
$10.00 off

PROX Piston Kit 01.3410.A

Sale price $286⁰⁰ AUD Regular price $296⁰⁰

Very low stock (1 unit)
$6.00 off

PROX Piston Kit 01.4337.C

Sale price $271⁰⁰ AUD Regular price $277⁰⁰

Low stock (3 units)
PROX Piston Kit 01.4406.B

Regular price $286⁰⁰ AUD

Low stock (2 units)
PROX Piston Kit 01.4406.A

Regular price $286⁰⁰ AUD

In stock (27 units)
PROX Piston Kit 01.6105.B

Regular price $143⁰⁰ AUD

In stock (148 units)
PROX Piston Kit 01.4406.C

Regular price $286⁰⁰ AUD

Low stock (4 units)
$6.00 off

PROX Piston Kit 01.4337.B

Sale price $271⁰⁰ AUD Regular price $277⁰⁰

In stock (19 units)
PROX Piston Kit 01.6105.A

Regular price $143⁰⁰ AUD

Low stock (3 units)
PROX Piston Kit 01.6105.D

Regular price $143⁰⁰ AUD

Low stock (4 units)
$28.00 off

PROX Piston Kit 01.6343.A

Sale price $211⁰⁰ AUD Regular price $239⁰⁰

In stock (34 units)
PROX Piston Kit 01.6105.C

Regular price $143⁰⁰ AUD

Low stock (4 units)
Sold out
$28.00 off

PROX Piston Kit 01.6343.C

Sale price $211⁰⁰ AUD Regular price $239⁰⁰
$28.00 off

PROX Piston Kit 01.6343.D

Sale price $211⁰⁰ AUD Regular price $239⁰⁰

Very low stock (1 unit)
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$30.00 off

PROX Piston Kit 01.6338.A

Sale price $316⁰⁰ AUD Regular price $346⁰⁰
$30.00 off

PROX Piston Kit 01.6338.B

Sale price $316⁰⁰ AUD Regular price $346⁰⁰

Very low stock (1 unit)
$30.00 off

PROX Piston Kit 01.6338.C

Sale price $316⁰⁰ AUD Regular price $346⁰⁰

Very low stock (1 unit)
$51.00 off

PROX Piston Kit 01.6427.A

Sale price $295⁰⁰ AUD Regular price $346⁰⁰

Low stock (2 units)
$51.00 off

PROX Piston Kit 01.6427.C

Sale price $295⁰⁰ AUD Regular price $346⁰⁰

Low stock (2 units)
$11.00 off

PROX Piston Kit 01.6521.A

Sale price $324⁰⁰ AUD Regular price $335⁰⁰

Low stock (2 units)
Sold out

PROX Piston Kit 01.6509.A

Regular price $349⁰⁰ AUD
$11.00 off

PROX Piston Kit 01.6521.B

Sale price $324⁰⁰ AUD Regular price $335⁰⁰

Very low stock (1 unit)

Let customers speak for us

from 666 reviews

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