PROX – Page 28 – Bill's Exhausts

PROX Piston Kit 01.1408.025

Regular price ¥29,500 JPY

Low stock (2 units)
PROX Piston Kit 01.1408.000

Regular price ¥29,500 JPY

In stock (70 units)
PROX Piston Kit 01.1408.050

Regular price ¥29,500 JPY

In stock (40 units)
PROX Piston Kit 01.1408.075

Regular price ¥29,500 JPY

In stock (42 units)
PROX Piston Kit 01.1408.100

Regular price ¥29,500 JPY

In stock (20 units)
Sold out

PROX Ring Set 02.1406.050

Regular price ¥8,100 JPY
Sold out

PROX Ring Set 02.1406.100

Regular price ¥8,100 JPY
PROX Piston Kit 01.1408.125

Regular price ¥29,500 JPY

In stock (6 units)
¥500 off

PROX Piston Kit 01.2281.000

Sale price ¥16,900 JPY Regular price ¥17,400

In stock (93 units)
Sold out
¥500 off

PROX Piston Kit 01.2281.025

Sale price ¥16,900 JPY Regular price ¥17,400
¥500 off

PROX Piston Kit 01.2281.050

Sale price ¥16,900 JPY Regular price ¥17,400

In stock (73 units)
¥500 off

PROX Piston Kit 01.2281.100

Sale price ¥16,900 JPY Regular price ¥17,400

Low stock (2 units)
Sold out

PROX Piston Kit 01.2281.075

Regular price ¥17,400 JPY
Sold out

PROX Piston Kit 01.2281.125

Regular price ¥17,400 JPY
¥1,300 off

PROX Piston Kit 01.2020.000

Sale price ¥15,900 JPY Regular price ¥17,200

In stock (28 units)
¥1,300 off

PROX Piston Kit 01.2020.025

Sale price ¥15,900 JPY Regular price ¥17,200

In stock (108 units)
PROX Ring Set 02.2020.025

Regular price ¥8,000 JPY

Very low stock (1 unit)
¥500 off

PROX Piston Kit 01.2281.150

Sale price ¥16,900 JPY Regular price ¥17,400

Low stock (3 units)
PROX Ring Set 02.2020.000

Regular price ¥7,900 JPY

Very low stock (1 unit)
¥1,300 off

PROX Piston Kit 01.2020.075

Sale price ¥15,900 JPY Regular price ¥17,200

In stock (50 units)
PROX Ring Set 02.2020.050

Regular price ¥8,000 JPY

Low stock (2 units)
¥1,300 off

PROX Piston Kit 01.2020.050

Sale price ¥15,900 JPY Regular price ¥17,200

In stock (75 units)
¥1,300 off

PROX Piston Kit 01.2020.125

Sale price ¥15,900 JPY Regular price ¥17,200

Low stock (4 units)
¥1,300 off

PROX Piston Kit 01.2020.100

Sale price ¥15,900 JPY Regular price ¥17,200

In stock (75 units)
PROX Ring Set 02.2020.150

Regular price ¥8,000 JPY

Low stock (3 units)
¥1,300 off

PROX Piston Kit 01.2020.150

Sale price ¥15,900 JPY Regular price ¥17,200

Low stock (2 units)
PROX Piston Kit 01.4221.A

Regular price ¥16,900 JPY

Very low stock (1 unit)
Sold out
¥400 off

PROX Ring Set 2.1208

Sale price ¥4,000 JPY Regular price ¥4,400
PROX Piston Kit 01.4221.B

Regular price ¥16,900 JPY

Low stock (3 units)
Sold out
¥1,900 off

PROX Piston Kit 01.1208.A1

Sale price ¥16,900 JPY Regular price ¥18,800
¥1,900 off

PROX Piston Kit 01.1208.A3

Sale price ¥16,900 JPY Regular price ¥18,800

Low stock (2 units)
¥400 off

PROX Ring Set 2.4106

Sale price ¥4,000 JPY Regular price ¥4,400

Very low stock (1 unit)
¥1,900 off

PROX Piston Kit 01.1218.A1

Sale price ¥16,900 JPY Regular price ¥18,800

In stock (157 units)
¥1,900 off

PROX Piston Kit 01.1218.A4

Sale price ¥16,900 JPY Regular price ¥18,800

Low stock (3 units)
Sold out
¥1,900 off

PROX Piston Kit 01.1218.A3

Sale price ¥16,900 JPY Regular price ¥18,800
Sold out
¥400 off

PROX Ring Set 2.1213

Sale price ¥4,000 JPY Regular price ¥4,400
¥1,900 off

PROX Piston Kit 01.1218.A2

Sale price ¥16,900 JPY Regular price ¥18,800

In stock (28 units)
Sold out
¥1,400 off

PROX Piston Kit 01.4108.B

Sale price ¥14,300 JPY Regular price ¥15,700
¥1,400 off
PROX Piston Kit 01.4108.A

Sale price ¥14,300 JPY Regular price ¥15,700

Low stock (2 units)
¥1,400 off

PROX Piston Kit 01.4108.C

Sale price ¥14,300 JPY Regular price ¥15,700

Very low stock (1 unit)
¥1,400 off

PROX Piston Kit 01.4121.A

Sale price ¥14,300 JPY Regular price ¥15,700

In stock (6 units)
¥1,400 off

PROX Piston Kit 01.4121.B

Sale price ¥14,300 JPY Regular price ¥15,700

In stock (26 units)
¥400 off

PROX Ring Set 2.4121

Sale price ¥4,000 JPY Regular price ¥4,400

Low stock (2 units)
¥1,200 off

PROX Piston Kit 01.4100.B

Sale price ¥12,700 JPY Regular price ¥13,900

Very low stock (1 unit)
Sold out
¥400 off

PROX Ring Set 2.41

Sale price ¥4,000 JPY Regular price ¥4,400
Sold out
¥400 off

PROX Ring Set 2.421

Sale price ¥4,000 JPY Regular price ¥4,400
¥1,900 off

PROX Piston Kit 01.4213.C

Sale price ¥16,900 JPY Regular price ¥18,800

Very low stock (1 unit)
Sold out

PSTN KIT KX125 94 .0 01.4213.B

Regular price ¥0 JPY
¥1,900 off

PROX Piston Kit 01.4216.A

Sale price ¥16,900 JPY Regular price ¥18,800

Very low stock (1 unit)
¥1,900 off

PROX Piston Kit 01.4216.C

Sale price ¥16,900 JPY Regular price ¥18,800

In stock (9 units)

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