PROX – Page 8 – Bill's Exhausts

$2.00 off

PROX Piston Kit - Standard - KTM 50SX 01.6012.A

Sale price $104⁰⁰ NZD Regular price $106⁰⁰

Low stock (4 units)
$2.00 off

PROX Piston Kit - Standard - KTM 50SX 01.6012.B

Sale price $104⁰⁰ NZD Regular price $106⁰⁰

In stock (85 units)
$13.00 off

PROX Piston Kit - Standard - KTM 65SX 01.6022.A

Sale price $104⁰⁰ NZD Regular price $117⁰⁰

Low stock (4 units)
$13.00 off
PROX Piston Kit - Standard - KTM 65SX 01.6022.B

Sale price $104⁰⁰ NZD Regular price $117⁰⁰

Very low stock (1 unit)
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PROX Piston Kit - Standard - KTM 125SX 01.6220.B

Regular price $216⁰⁰ NZD
PROX Piston Kit - Standard - 125SX 01.6220.A

Regular price $216⁰⁰ NZD

Low stock (4 units)
$16.00 off

PROX Piston Kit - Standard - KTM 200EXC 01.6249.A

Sale price $241⁰⁰ NZD Regular price $257⁰⁰

Low stock (2 units)
PROX Piston Kit - Standard - MXZ 500 01.5595.000

Regular price $183⁰⁰ NZD

Very low stock (1 unit)
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$27.00 off

PROX Piston Kit - +.10" - MXZ 500 01.5595.100

Sale price $151⁰⁰ NZD Regular price $178⁰⁰
PROX Piston Kit - +.05" - MXZ 500 01.5595.050

Regular price $183⁰⁰ NZD

Low stock (2 units)
$34.00 off

PROX Piston Kit - 300EXC TPI '18-'19 01.6388.A

Sale price $327⁰⁰ NZD Regular price $361⁰⁰

Low stock (4 units)
$16.00 off

PROX Piston Kit - Standard - 200EXC 01.6249.B

Sale price $241⁰⁰ NZD Regular price $257⁰⁰

Very low stock (1 unit)
$34.00 off

PROX Piston Kit - 300EXC TPI 01.6388.B

Sale price $327⁰⁰ NZD Regular price $361⁰⁰

In stock (27 units)
$34.00 off

PROX Piston Kit - KTM300EXC '17-'18 01.6387.B

Sale price $327⁰⁰ NZD Regular price $361⁰⁰

In stock (5 units)
$34.00 off

PROX Piston Kit - 300EXC TPI '18-'19 01.6388.C

Sale price $327⁰⁰ NZD Regular price $361⁰⁰

In stock (6 units)
$36.00 off

PROX Piston Kit - Beta RR300 '18-'19 01.7398.B

Sale price $345⁰⁰ NZD Regular price $381⁰⁰

In stock (59 units)
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$5.00 off

PROX Ring Set 2.3122

Sale price $43⁰⁰ NZD Regular price $48⁰⁰
$14.00 off

PROX Ring Set 2.1402

Sale price $95⁰⁰ NZD Regular price $109⁰⁰

Low stock (3 units)
$5.00 off

PROX Ring Set 2.1111

Sale price $43⁰⁰ NZD Regular price $48⁰⁰

In stock (5 units)
Sold out
$5.00 off

PROX Ring Set 02.5699.050

Sale price $28⁰⁰ NZD Regular price $33⁰⁰
PROX Ring Set 02.5699.100

Regular price $33⁰⁰ NZD

Low stock (3 units)
PROX Ring Set 02.5699.000

Regular price $43⁰⁰ NZD

Low stock (3 units)
PROX Ring Set 2.5603

Regular price $43⁰⁰ NZD

Low stock (2 units)
PROX Ring Set 2.5703

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
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$5.00 off

PROX Ring Set 02.2599.200

Sale price $34⁰⁰ NZD Regular price $39⁰⁰
PROX Ring Set 02.2599.150

Regular price $43⁰⁰ NZD

In stock (6 units)
PROX Ring Set 2.5807

Regular price $43⁰⁰ NZD

In stock (7 units)
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PROX Ring Set 02.5802.000

Regular price $43⁰⁰ NZD
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PROX Ring Set 02.5802.100

Regular price $43⁰⁰ NZD
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$5.00 off

PROX Ring Set 2.5906

Sale price $28⁰⁰ NZD Regular price $33⁰⁰
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$5.00 off

PROX Ring Set 02.2599.050

Sale price $34⁰⁰ NZD Regular price $39⁰⁰
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PROX Ring Set 02.2599.000

Regular price $43⁰⁰ NZD
Sold out
$5.00 off

PROX Ring Set 02.2599.100

Sale price $34⁰⁰ NZD Regular price $39⁰⁰
Sold out
$5.00 off

PROX Ring Set 2.2697

Sale price $34⁰⁰ NZD Regular price $39⁰⁰
PROX Ring Set 02.5601.000

Regular price $43⁰⁰ NZD

Low stock (2 units)
PROX Ring Set 2.5597

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
PROX Piston Rings 2.1227

Regular price $86⁰⁰ NZD

Low stock (3 units)
PROX Piston Rings 2.134

Regular price $86⁰⁰ NZD

Very low stock (1 unit)
PROX Piston Rings 2.3408

Regular price $86⁰⁰ NZD

In stock (6 units)
Sold out
$12.00 off

PROX Piston Rings 2.2402

Sale price $64⁰⁰ NZD Regular price $76⁰⁰
PROX Piston Rings 2.334

Regular price $86⁰⁰ NZD

Very low stock (1 unit)
PROX Piston Rings 2.3337

Regular price $78⁰⁰ NZD

Low stock (4 units)
Sold out
$12.00 off

PROX Piston Rings 2.6427

Sale price $66⁰⁰ NZD Regular price $78⁰⁰
$5.00 off

PROX Piston Rings 2.4124

Sale price $43⁰⁰ NZD Regular price $48⁰⁰

Very low stock (1 unit)
PROX Piston Rings 2.6012

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
Sold out

PROX Piston Rings 2.4336

Regular price $86⁰⁰ NZD
PROX Piston Rings 2.6225

Regular price $86⁰⁰ NZD

In stock (5 units)
PROX Piston Rings 2.6228

Regular price $63⁰⁰ NZD

Very low stock (1 unit)
Sold out

PISTON RINGS 02.6249 2.6249

Regular price $0⁰⁰ NZD
Sold out

PROX Piston Rings 2.6351

Regular price $86⁰⁰ NZD

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.

IN STOCK 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