PRO Program members can receive tiered savings on this line—up to 20% more off for qualifying accounts.
Shipping estimate & delivery timing
Share this product on social media and get an exclusive discount code!
Click any platform below to share this product. After sharing, you'll receive a discount code!
Built to support repair shops, fleets, and equipment owners with dependable parts sourcing and responsive service.
Qualifying new parts include 1-year coverage. Review the Warranty Policy section for coverage details, claim steps, and exclusions.
Eligible orders may qualify for returns within 90 days. See the Easy Return Policy section for conditions and next steps.
Send a question through Ask a Product Question or the contact form. Our team reviews requests on business days and follows up as quickly as possible.
| Engine Number | NT855, ISB CM2150, ISBE CM2150, ISB, B3.3, B6.7 CM2350 B121B, B6.7 CM2350 B136C, ISB6.7 CM2250, ISBe4 CM850, ISD6.7 CM2150 SN, ISB6.7 CM2350 B101, ISL G CM2180, ISC CM850, ISL CM2150, ISL CM850, B6.7 CM2350 B157C, B6.7 CM2450 B155B, B6.7N CM2380 B150B |
| Compatible Engine Brand | For CUMMINS |
| original | 4309439,4309439RX |
No reviews yet. Be the first to review!
Official answers about compatibility, package contents, specifications, installation, shipping, and warranty for Air Compressor Head Kit 4309439 for Cummins Engine NT855 B3.3 B6.7 ISB ISB6.7 ISM11 ISM L9 QSB6.7 QSL9 QSM11 (SKU: ESY16905).
No product questions yet. Ask us using the product question form.
Send us your product question and we'll reply by email.
Every new aftermarket part from us includes a 1-year warranty. Full terms, coverage, and how to make a claim: Warranty Assistance.
We ship to customers around the world. Orders are sent with our standard courier service—trackable, dependable, and easy to work with. On this product page, use Get Estimate under the price to see shipping cost and estimated delivery for your location. For destinations, rules, and full details, read our Shipping Policy Details.
We want you to be confident in your order. If you are not satisfied, you may qualify for a return or refund within 90 days, subject to conditions. See our Easy Return Policy for eligibility, steps, and exceptions.
