PROX – Page 8 – Bill's Exhausts

$2.00 off

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

Sale price $102⁰⁰ NZD Regular price $104⁰⁰

In stock (5 units)
$2.00 off

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

Sale price $102⁰⁰ NZD Regular price $104⁰⁰

In stock (23 units)
$13.00 off

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

Sale price $102⁰⁰ NZD Regular price $115⁰⁰

Low stock (2 units)
$13.00 off
PROX Piston Kit - Standard - KTM 65SX 01.6022.B

Sale price $102⁰⁰ NZD Regular price $115⁰⁰

Low stock (2 units)
PROX Piston Kit - Standard - KTM 125SX 01.6220.B

Regular price $211⁰⁰ NZD

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

Regular price $211⁰⁰ NZD

In stock (5 units)
$16.00 off

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

Sale price $237⁰⁰ NZD Regular price $253⁰⁰

Very low stock (1 unit)
PROX Piston Kit - Standard - MXZ 500 01.5595.000

Regular price $179⁰⁰ NZD

Low stock (3 units)
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$26.00 off

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

Sale price $148⁰⁰ NZD Regular price $174⁰⁰
PROX Piston Kit - +.05" - MXZ 500 01.5595.050

Regular price $179⁰⁰ NZD

Low stock (2 units)
$33.00 off

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

Sale price $321⁰⁰ NZD Regular price $354⁰⁰

In stock (7 units)
$16.00 off

PROX Piston Kit - Standard - 200EXC 01.6249.B

Sale price $237⁰⁰ NZD Regular price $253⁰⁰

Very low stock (1 unit)
$33.00 off

PROX Piston Kit - 300EXC TPI 01.6388.B

Sale price $321⁰⁰ NZD Regular price $354⁰⁰

In stock (10 units)
$33.00 off

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

Sale price $321⁰⁰ NZD Regular price $354⁰⁰

In stock (5 units)
$33.00 off

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

Sale price $321⁰⁰ NZD Regular price $354⁰⁰

In stock (11 units)
$35.00 off

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

Sale price $338⁰⁰ NZD Regular price $373⁰⁰

In stock (14 units)
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$4.00 off

PROX Ring Set 2.3122

Sale price $43⁰⁰ NZD Regular price $47⁰⁰
$14.00 off

PROX Ring Set 2.1402

Sale price $93⁰⁰ NZD Regular price $107⁰⁰

Low stock (4 units)
$4.00 off

PROX Ring Set 2.1111

Sale price $43⁰⁰ NZD Regular price $47⁰⁰

In stock (5 units)
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$4.00 off

PROX Ring Set 02.5699.050

Sale price $28⁰⁰ NZD Regular price $32⁰⁰
PROX Ring Set 02.5699.100

Regular price $32⁰⁰ NZD

Low stock (3 units)
PROX Ring Set 02.5699.000

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
PROX Ring Set 2.5603

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
PROX Ring Set 2.5703

Regular price $43⁰⁰ NZD

In stock (5 units)
Sold out
$6.00 off

PROX Ring Set 02.2599.200

Sale price $33⁰⁰ 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)
PROX Ring Set 02.5802.000

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
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PROX Ring Set 02.5802.100

Regular price $43⁰⁰ NZD
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$4.00 off

PROX Ring Set 2.5906

Sale price $28⁰⁰ NZD Regular price $32⁰⁰
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$6.00 off

PROX Ring Set 02.2599.050

Sale price $33⁰⁰ NZD Regular price $39⁰⁰
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PROX Ring Set 02.2599.000

Regular price $43⁰⁰ NZD
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$6.00 off

PROX Ring Set 02.2599.100

Sale price $33⁰⁰ NZD Regular price $39⁰⁰
Sold out
$6.00 off

PROX Ring Set 2.2697

Sale price $33⁰⁰ NZD Regular price $39⁰⁰
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PROX Ring Set 02.5601.000

Regular price $43⁰⁰ NZD
PROX Ring Set 2.5597

Regular price $43⁰⁰ NZD

Very low stock (1 unit)
PROX Piston Rings 2.1227

Regular price $85⁰⁰ NZD

Low stock (3 units)
PROX Piston Rings 2.134

Regular price $85⁰⁰ NZD

Very low stock (1 unit)
PROX Piston Rings 2.3408

Regular price $85⁰⁰ NZD

In stock (6 units)
Sold out
$11.00 off

PROX Piston Rings 2.2402

Sale price $63⁰⁰ NZD Regular price $74⁰⁰
PROX Piston Rings 2.334

Regular price $85⁰⁰ NZD

Low stock (2 units)
PROX Piston Rings 2.3337

Regular price $76⁰⁰ NZD

Low stock (3 units)
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$12.00 off

PROX Piston Rings 2.6427

Sale price $65⁰⁰ NZD Regular price $77⁰⁰
$4.00 off

PROX Piston Rings 2.4124

Sale price $43⁰⁰ NZD Regular price $47⁰⁰

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 $85⁰⁰ NZD
PROX Piston Rings 2.6225

Regular price $85⁰⁰ NZD

In stock (5 units)
PROX Piston Rings 2.6228

Regular price $62⁰⁰ 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 $85⁰⁰ NZD

Let customers speak for us

from 604 reviews

Perfect fit

Box arrived damaged from UPS but because of the great packaging it was un-damaged. Fit perfectly on the bike.

Steven Langen

10/03/2025

IN STOCK 71776MI Arrow Racing Link Pipe, Stainless Steel for BMW F750GS/850GS/ 2021-2025 F 900 GS / F 900 GS Adventure ’24/25

Love it

Love it, love the sound, way lighter than stock exhaust.

Benjamin Bradley

10/01/2025

Graves Slip-on titanium exhaust CRF450RL/ L / LX 2019-2025 EXH-19C4X-SOT

Great exhaust

Great exhaust. Great feedback from Bill’s Exhausts, would order from here again.

Lawson Leatherwood

Austin Racing GP1R YAMAHA 2021-2025 MT09/FZ09 GP3 BOX DELETE RACE EXHAUST SYSTEM AR68

Sounds amazing! And came right in time before GAT

Sounds amazing! And came right in time before GAT. great customer service as well.

kawasakik4

09/25/2025

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

The Arrow Exhaust System I bought for my Tiger 900 Rally Pro is exactly what I was looking for

The Arrow Exhaust System I bought for my Tiger 900 Rally Pro is exactly what I was looking for. Lightweight, looks great, and sounds amazing!

Michael Leon

09/23/2025

IN STOCK 72006VAN Arrow Veloce RACING Slip-on Exhaust, Aluminum Dark for Triumph Tiger 900 24-25

I love the Titanium Exhaust Manifold on my 2024 Rocket 3 GT

I love the Titanium Exhaust Manifold on my 2024 Rocket 3 GT, The fit was perfect and look was just as good. The true beauty is how it blued & red coloration after the first few heat cycles. The carbon fiber shields are a great touch but the fit and finish are fantastic. The bike looks great and performance is even better.

Andrew Herold

09/20/2025

IN STOCK Vandemon Triumph Rocket 3R & GT 2500cc 2019-2025 Titanium Exhaust Manifold TRIUMROCKET3SSHEADR VA-11

Nice item

Well made, fit well, looks nice, priced decently compared to other brands. Satisfied with purchase.

Anonymous

09/17/2025

LEOVINCE LV-10 Slip-On Muffler - Black Edition GSX-S 1000 2022-2024 15245B 1811-4351

Waw

The Sound is just amazingand iI love it !

Maxime L

09/13/2025

M4 Exhaust Carbon Fiber Street Slayer Slip On 2009 - 2025 ZX6R KA6914

Thankss

09/11/2025

M4 Exhaust All Black Full System MT-09/SXR900 2021 - 2025 YA6932

very easy install

very easy install. makes it good for the neighbors and easy out for a trackday

DPGolino

09/02/2025

M4 Q1 Quiet Insert

great piece for my GSX-R 600

great piece for my GSX-R 600. Was easy to install. I ordered the level 1 baffle with the snap ring. Sounds great and has a little more punch.

08/27/2025

M4 Exhaust GP Black Slip on GSXR600/750 2011-2025 SU6112-GP

Very happy with my Austin Racing product!

Very happy with my Austin Racing product! Sounds great and look very good! It was almost a 8 weeks wait, so plan for it. They arrived decently packed and protected with several stickers.

Benjamin

08/26/2025

Austin Racing 2024-2025 DUCATI HYPERMOTARD 698 MONO TWIN EXIT SLIP-ON EXHAUST SYSTEM

Great product and excellent service

The product's quality is commendable, and the service provided exceeded expectations. Although the exhaust system was initially estimated to be delivered within 4-5 weeks due to a backorder, the item arrived within 1.5 weeks. Furthermore, communication was consistently effective, with regular email updates provided.

Dhiraj B

08/21/2025