Home/Cummins ISX / ISX15 / X15 Parts/Cummins ISX / ISX15 / X15 Cylinder Head Bolt Kit – New, Grade 12.9

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Cummins · Models: ISX / ISX15 / X15

Cummins ISX / ISX15 / X15 Cylinder Head Bolt Kit – New, Grade 12.9

Commercial diesel cylinder head fastener. Match the listed part and engine identifiers before ordering.
Warranty DetailsJAK's Diesel
$299.00
In Stock
Fitment details

Want us to check the fit? Share any details you have below. All fields are optional. Your request will be included with your order, and a specialist may contact you before fulfillment.

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JAK'S Part #JAKS-ISXHBK
Not sure it's the right fit? Call a specialist
(720) 445-6249
Talk to a tech or text a photo of your part tag — we'll confirm fitment before you buy
Cummins ISX / ISX15 / X15 Cylinder Head Bolt Kit – New, Grade 12.9
BrandJAK's Diesel
Engine MakeCummins
Engine ModelISX · ISX15 · X15
ConditionNew

New grade 12.9 cylinder head bolt kit for the Cummins ISX / ISX15 / X15 — a complete set for one engine. Head bolts stretch when torqued, so always install new bolts with a new or replacement head.

What's Included

  • 26 head bolts for one engine (22 short, 4 long)

Specifications

Engine Cummins ISX / ISX15 / X15
Grade 12.9
Quantity One engine set
Condition New
Brand JAK's Diesel

Fitment

Fits Cummins ISX, ISX15 and X15 engines. Send us your engine serial number (ESN) and we will confirm fitment before it ships.

Replaces / Cross-Reference Part Numbers

3678506, 3678804

Shipping

Ships in 1–2 business days. Local pickup is available in Henderson, CO by arrangement.

Frequently Asked Questions

Can I reuse my old head bolts?

We do not recommend it. Head bolts are torque-to-yield and stretch in service. New bolts give consistent clamp load on the new gasket.

Questions? Call JAK's Diesel at (720) 445-6249. See all Cummins ISX / X15 parts.