DIAMOND ENGINEERING

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DIAMOND ENGINEERING Bolt Kit - Caliper - Front - FL/FX PB799S

Regular price ¥5,900 JPY
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DIAMOND ENGINEERING Bolt Kit - Rocker Cover Only - M8 PB937S

Regular price ¥16,800 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission/Side Cover DE5022HP

Regular price ¥6,500 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission Top - Touring DE5026HP

Regular price ¥2,900 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission Top - Touring DE5024HP

Regular price ¥2,700 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission Top - FX DE5140HP

Regular price ¥4,200 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission/Side Cover DE5205HP

Regular price ¥8,300 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission Top Cover DE5206HP

Regular price ¥3,400 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission/Side Cover DE5276HP

Regular price ¥7,500 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission/Side Cover DE5251HP

Regular price ¥6,700 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - FL DE5437SCHP

Regular price ¥10,800 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - Touring DE5467SCHP

Regular price ¥7,300 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - Softail DE5469SCHP

Regular price ¥8,000 JPY
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DIAMOND ENGINEERING Bolt Kit - Transmission/Side Cover DE5444HP

Regular price ¥5,600 JPY
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DIAMOND ENGINEERING Bolt Kit - Transformation - Touring DE6045HP

Regular price ¥33,500 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - Softail DE5471SCHP

Regular price ¥9,400 JPY
DIAMOND ENGINEERING Bolt Kit - Transformation - OE - Touring DE6047HP

Regular price ¥14,500 JPY

Very low stock (1 unit)
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DIAMOND ENGINEERING Bolt Kit - Transformation - OE - FLT DE6051HP

Regular price ¥15,900 JPY
DIAMOND ENGINEERING Bolt Kit - Transformation - OE - Touring DE6049HP

Regular price ¥16,800 JPY

In stock (6 units)
DIAMOND ENGINEERING Bolt Kit - Transformation - Touring DE6067HP

Regular price ¥35,000 JPY

Very low stock (1 unit)
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DIAMOND ENGINEERING Bolt Kit - Top Cover - 12-Point - FX PB589S

Regular price ¥7,000 JPY
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DIAMOND ENGINEERING Bolt Kit - Transformation - 12-Point PB618S

Regular price ¥66,600 JPY
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DIAMOND ENGINEERING Bolt Kit - Transformation - 12-Point - Touring PB635S

Regular price ¥29,500 JPY
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DIAMOND ENGINEERING Bolt Kit - Transformation - 12-Point - FLHT PB637S

Regular price ¥36,800 JPY
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DIAMOND ENGINEERING Bolt Kit - 12-Point - Side Cover PB569S

Regular price ¥17,800 JPY
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DIAMOND ENGINEERING 12-Point Transformation Bolt Kit - FLTR PB639S

Regular price ¥42,000 JPY
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DIAMOND ENGINEERING Bolt Kit - 12-Point - Side Cover PB822S

Regular price ¥13,300 JPY
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DIAMOND ENGINEERING Bolt Kit - Transformation - 12-Point - Touring PB643S

Regular price ¥66,400 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - 12-Point - FL PB896S

Regular price ¥20,500 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - 12-Point - Touring PB930S

Regular price ¥16,000 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - 12-Point - FL/X PB931S

Regular price ¥15,600 JPY
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DIAMOND ENGINEERING Banjo Bolt - M10 x 1.25 PB886S

Regular price ¥4,000 JPY
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DIAMOND ENGINEERING Bolt Kit - Motor Mount - 12-Point - FL/X PB932S

Regular price ¥19,000 JPY
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DIAMOND ENGINEERING Head Bolt Washers - M8 - 8-Pack DE5458HP

Regular price ¥7,800 JPY
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DIAMOND ENGINEERING 12-Point Crankcase Bolt - Twin Cam - 3.75" PB838S

Regular price ¥3,400 JPY
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DIAMOND ENGINEERING Bolt Kit - 12-Point Head - M8 - 8-Pack PB437S

Regular price ¥41,800 JPY
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DIAMOND ENGINEERING Nuts - Thin - Nylock - 1/2-20 10 PACK NJLF08P-10

Regular price ¥5,400 JPY
DIAMOND ENGINEERING Nuts - Flange - Exhaust - 5/16" x 24 NFF05P-50

Regular price ¥21,100 JPY

In stock (20 units)
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DIAMOND ENGINEERING Washer - Side Cover WN04P-100

Regular price ¥10,200 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 3/4" TC0406HP-10

Regular price ¥8,400 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 1/2" TC0404HP-10

Regular price ¥7,300 JPY
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DIAMOND ENGINEERING Bolt Assortment - 12-Point - Coarse - Short ZT05HP

Regular price ¥154,400 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 7/8" TC0407HP-10

Regular price ¥8,600 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 1-1/4" TC0412HP-10

Regular price ¥9,200 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 1-1/2" TC0414HP-10

Regular price ¥10,800 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 1-3/4" TC0416HP-10

Regular price ¥11,000 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 1" TC0410HP-10

Regular price ¥8,800 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 2-1/4" TC0422HP-10

Regular price ¥11,300 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 2" TC0420HP-10

Regular price ¥11,100 JPY
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DIAMOND ENGINEERING Bolt - 12-Point - 1/4"-20 x 2-1/2" TC0424HP-10

Regular price ¥11,400 JPY

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.

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