PROX – Page 4 – Bill's Exhausts

PROX Piston Kit 01.1225.B

Regular price ¥16,900 JPY

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

Regular price ¥16,900 JPY

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

Regular price ¥22,300 JPY

Low stock (2 units)
Sold out

PROX Piston Kit 01.4325.C

Regular price ¥22,300 JPY
Sold out

PROX Piston Kit 01.4325.D

Regular price ¥22,000 JPY
¥3,000 off

PROX Piston Kit 01.2435.B

Sale price ¥31,100 JPY Regular price ¥34,100

In stock (78 units)
¥3,000 off

PROX Piston Kit 01.2435.A

Sale price ¥31,100 JPY Regular price ¥34,100

In stock (7 units)
¥2,700 off

PROX Piston Kit 01.1414.A

Sale price ¥31,100 JPY Regular price ¥33,800

In stock (40 units)
¥2,700 off

PROX Piston Kit 01.1414.B

Sale price ¥31,100 JPY Regular price ¥33,800

In stock (7 units)
¥3,000 off

PROX Piston Kit 01.2435.C

Sale price ¥31,100 JPY Regular price ¥34,100

Very low stock (1 unit)
¥1,300 off

PROX Piston Kit 01.2020.250

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

In stock (28 units)
PROX Piston Kit 01.3180.050

Regular price ¥14,300 JPY

In stock (7 units)
PROX Piston Kit 01.3180.000

Regular price ¥14,300 JPY

Low stock (3 units)
Sold out

PROX Piston Kit 01.3180.100

Regular price ¥13,300 JPY
¥1,400 off

PROX Piston Kit 01.1111.B

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

In stock (9 units)
Sold out

PROX Piston Kit 01.3180.150

Regular price ¥13,300 JPY
¥2,000 off
PROX Piston Kit 01.1338.A

Sale price ¥29,600 JPY Regular price ¥31,600

In stock (10 units)
¥1,400 off

PROX Piston Kit 01.1111.C

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

In stock (11 units)
¥2,000 off

PROX Piston Kit 01.1338.B

Sale price ¥29,600 JPY Regular price ¥31,600

In stock (32 units)
¥2,000 off

PROX Piston Kit 01.1338.C

Sale price ¥29,600 JPY Regular price ¥31,600

Low stock (4 units)
Sold out
¥3,500 off
PROX Piston Kit 01.1339.A

Sale price ¥29,600 JPY Regular price ¥33,100
¥3,000 off

PROX Piston Kit 01.2406.C

Sale price ¥28,600 JPY Regular price ¥31,600

In stock (16 units)
¥3,500 off

PROX Piston Kit 01.1339.B

Sale price ¥29,600 JPY Regular price ¥33,100

In stock (6 units)
¥600 off

PROX Piston Kit 01.3338.A

Sale price ¥28,600 JPY Regular price ¥29,200

Low stock (3 units)
¥3,100 off

PROX Piston Kit 01.2427.C

Sale price ¥29,600 JPY Regular price ¥32,700

Low stock (2 units)
¥600 off

PROX Piston Kit 01.3338.B

Sale price ¥28,600 JPY Regular price ¥29,200

Very low stock (1 unit)
¥1,000 off

PROX Piston Kit 01.3410.B

Sale price ¥30,200 JPY Regular price ¥31,200

Very low stock (1 unit)
¥1,000 off

PROX Piston Kit 01.3410.C

Sale price ¥30,200 JPY Regular price ¥31,200

Very low stock (1 unit)
¥600 off
PROX Piston Kit 01.4337.A

Sale price ¥28,600 JPY Regular price ¥29,200

In stock (7 units)
¥1,000 off

PROX Piston Kit 01.3410.A

Sale price ¥30,200 JPY Regular price ¥31,200

Very low stock (1 unit)
¥600 off

PROX Piston Kit 01.4337.C

Sale price ¥28,600 JPY Regular price ¥29,200

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

Regular price ¥30,200 JPY

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

Regular price ¥30,200 JPY

In stock (26 units)
PROX Piston Kit 01.6105.B

Regular price ¥15,100 JPY

In stock (142 units)
PROX Piston Kit 01.4406.C

Regular price ¥30,200 JPY

Low stock (4 units)
¥600 off

PROX Piston Kit 01.4337.B

Sale price ¥28,600 JPY Regular price ¥29,200

In stock (17 units)
PROX Piston Kit 01.6105.A

Regular price ¥15,100 JPY

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

Regular price ¥15,100 JPY

Low stock (4 units)
¥3,000 off

PROX Piston Kit 01.6343.A

Sale price ¥22,300 JPY Regular price ¥25,300

In stock (32 units)
PROX Piston Kit 01.6105.C

Regular price ¥15,100 JPY

Low stock (4 units)
Sold out
¥3,000 off

PROX Piston Kit 01.6343.C

Sale price ¥22,300 JPY Regular price ¥25,300
¥3,000 off

PROX Piston Kit 01.6343.D

Sale price ¥22,300 JPY Regular price ¥25,300

Very low stock (1 unit)
Sold out
¥3,100 off

PROX Piston Kit 01.6338.A

Sale price ¥33,400 JPY Regular price ¥36,500
¥3,100 off

PROX Piston Kit 01.6338.B

Sale price ¥33,400 JPY Regular price ¥36,500

Very low stock (1 unit)
¥3,100 off

PROX Piston Kit 01.6338.C

Sale price ¥33,400 JPY Regular price ¥36,500

Very low stock (1 unit)
¥5,400 off

PROX Piston Kit 01.6427.A

Sale price ¥31,100 JPY Regular price ¥36,500

Low stock (2 units)
¥5,400 off

PROX Piston Kit 01.6427.C

Sale price ¥31,100 JPY Regular price ¥36,500

Low stock (2 units)
¥1,100 off

PROX Piston Kit 01.6521.A

Sale price ¥34,200 JPY Regular price ¥35,300

Low stock (2 units)
Sold out

PROX Piston Kit 01.6509.A

Regular price ¥36,900 JPY
¥1,100 off

PROX Piston Kit 01.6521.B

Sale price ¥34,200 JPY Regular price ¥35,300

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.

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