PROX – Page 28 – Bill's Exhausts

PROX Piston Kit 01.1408.025

Regular price $320⁰⁰ NZD

Low stock (2 units)
PROX Piston Kit 01.1408.000

Regular price $320⁰⁰ NZD

In stock (78 units)
PROX Piston Kit 01.1408.050

Regular price $320⁰⁰ NZD

In stock (44 units)
PROX Piston Kit 01.1408.075

Regular price $320⁰⁰ NZD

In stock (46 units)
PROX Piston Kit 01.1408.100

Regular price $320⁰⁰ NZD

In stock (22 units)
Sold out

PROX Ring Set 02.1406.050

Regular price $88⁰⁰ NZD
Sold out

PROX Ring Set 02.1406.100

Regular price $88⁰⁰ NZD
PROX Piston Kit 01.1408.125

Regular price $320⁰⁰ NZD

In stock (6 units)
$7.00 off

PROX Piston Kit 01.2281.000

Sale price $182⁰⁰ NZD Regular price $189⁰⁰

In stock (103 units)
Sold out
$7.00 off

PROX Piston Kit 01.2281.025

Sale price $182⁰⁰ NZD Regular price $189⁰⁰
$7.00 off

PROX Piston Kit 01.2281.050

Sale price $182⁰⁰ NZD Regular price $189⁰⁰

In stock (81 units)
$7.00 off

PROX Piston Kit 01.2281.100

Sale price $182⁰⁰ NZD Regular price $189⁰⁰

Low stock (2 units)
Sold out

PROX Piston Kit 01.2281.075

Regular price $189⁰⁰ NZD
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PROX Piston Kit 01.2281.125

Regular price $189⁰⁰ NZD
$14.00 off

PROX Piston Kit 01.2020.000

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

In stock (28 units)
$14.00 off

PROX Piston Kit 01.2020.025

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

In stock (120 units)
PROX Ring Set 02.2020.025

Regular price $86⁰⁰ NZD

Very low stock (1 unit)
$7.00 off

PROX Piston Kit 01.2281.150

Sale price $182⁰⁰ NZD Regular price $189⁰⁰

Low stock (3 units)
PROX Ring Set 02.2020.000

Regular price $85⁰⁰ NZD

Very low stock (1 unit)
$14.00 off

PROX Piston Kit 01.2020.075

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

In stock (54 units)
PROX Ring Set 02.2020.050

Regular price $86⁰⁰ NZD

Low stock (2 units)
$14.00 off

PROX Piston Kit 01.2020.050

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

In stock (75 units)
$14.00 off

PROX Piston Kit 01.2020.125

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

Low stock (4 units)
$14.00 off

PROX Piston Kit 01.2020.100

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

In stock (83 units)
PROX Ring Set 02.2020.150

Regular price $86⁰⁰ NZD

Low stock (3 units)
$14.00 off

PROX Piston Kit 01.2020.150

Sale price $172⁰⁰ NZD Regular price $186⁰⁰

Low stock (2 units)
$1.00 off

PROX Piston Kit 01.4221.A

Sale price $182⁰⁰ NZD Regular price $183⁰⁰

Very low stock (1 unit)
Sold out
$5.00 off

PROX Ring Set 2.1208

Sale price $43⁰⁰ NZD Regular price $48⁰⁰
$1.00 off

PROX Piston Kit 01.4221.B

Sale price $182⁰⁰ NZD Regular price $183⁰⁰

Low stock (3 units)
Sold out
$22.00 off

PROX Piston Kit 01.1208.A1

Sale price $182⁰⁰ NZD Regular price $204⁰⁰
$22.00 off

PROX Piston Kit 01.1208.A3

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

Low stock (2 units)
$5.00 off

PROX Ring Set 2.4106

Sale price $43⁰⁰ NZD Regular price $48⁰⁰

Very low stock (1 unit)
$22.00 off

PROX Piston Kit 01.1218.A1

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

In stock (169 units)
$22.00 off

PROX Piston Kit 01.1218.A4

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

Low stock (3 units)
Sold out
$22.00 off

PROX Piston Kit 01.1218.A3

Sale price $182⁰⁰ NZD Regular price $204⁰⁰
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$5.00 off

PROX Ring Set 2.1213

Sale price $43⁰⁰ NZD Regular price $48⁰⁰
$22.00 off

PROX Piston Kit 01.1218.A2

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

In stock (32 units)
Sold out
$15.00 off

PROX Piston Kit 01.4108.B

Sale price $155⁰⁰ NZD Regular price $170⁰⁰
$15.00 off
PROX Piston Kit 01.4108.A

Sale price $155⁰⁰ NZD Regular price $170⁰⁰

Low stock (2 units)
$15.00 off

PROX Piston Kit 01.4108.C

Sale price $155⁰⁰ NZD Regular price $170⁰⁰

Very low stock (1 unit)
$15.00 off

PROX Piston Kit 01.4121.A

Sale price $155⁰⁰ NZD Regular price $170⁰⁰

In stock (6 units)
$15.00 off

PROX Piston Kit 01.4121.B

Sale price $155⁰⁰ NZD Regular price $170⁰⁰

In stock (30 units)
$5.00 off

PROX Ring Set 2.4121

Sale price $43⁰⁰ NZD Regular price $48⁰⁰

Low stock (2 units)
$12.00 off

PROX Piston Kit 01.4100.B

Sale price $138⁰⁰ NZD Regular price $150⁰⁰

Very low stock (1 unit)
Sold out
$5.00 off

PROX Ring Set 2.41

Sale price $43⁰⁰ NZD Regular price $48⁰⁰
Sold out
$5.00 off

PROX Ring Set 2.421

Sale price $43⁰⁰ NZD Regular price $48⁰⁰
Sold out
$22.00 off

PROX Piston Kit 01.4213.C

Sale price $182⁰⁰ NZD Regular price $204⁰⁰
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PSTN KIT KX125 94 .0 01.4213.B

Regular price $0⁰⁰ NZD
$22.00 off

PROX Piston Kit 01.4216.A

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

Very low stock (1 unit)
$22.00 off

PROX Piston Kit 01.4216.C

Sale price $182⁰⁰ NZD Regular price $204⁰⁰

In stock (9 units)

Let customers speak for us

from 667 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