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KIT
New Aftermarket

6B / 6BT / 6BTA 5.9L Engine Overhaul Kit

SKU: CM6BOK-LPK-PRO
$64598
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In Stock (17)
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The RF Engine Advantage
Family Operated Since 1975

Original Equipment Quality

Parts that meet or exceed OEM specifications. Guaranteed performance you can trust. Reliability built into every component.

100+ Years of Expertise

A century of collective diesel knowledge and 10+ acres of engines and engine parts, we are more than just an online reseller or call center. We know heavy-duty diesel.

Here for the Long Haul

Same location and same phone number for the last 50 years. Same commitment to getting you the right parts at the right price.

New, Reman, & Used

RF Engine offers an expansive offering of new aftermarket, remanufactured, and used engines and engine parts all under one roof.

Details

Free Freight Overhaul Kit New Cummins 6B 6BT 6BTA 5.9L 6 Cyl Diesel Main Bearings, Rod Bearings, Front & Rear crankshaft seals, Complete gasket set, piston pin bushings, & camshaft bushings Pistons available in Standard, .50MM, 1.0MMChoose by CPL:596 597 599 600 691 692 698 712 714 Marine 715 716 729 742 Marine 761 791 Marine 792 802 804 807 834 845 856 912 938 940 943 947 948 949 950 953 Marine 960 961 962 970 Marine 983 987 994 998 999 1160 1163 1165 1168 1174 1189 1207 1209 1245 1246 1247 Marine 1261 1266 1279 1288 1289 Marine 1313 1320 1322 Marine 1351 1403 1422 1433 1440 1518 1519 1523 1524 1527 1549 1550 1551 Auto 1552 Auto 1553 Auto 1570 Marine 1579 1581 1613 Marine 1627 1638 1685 1815 1816 1863 1888 Auto 1889 1895 Auto 1901 1902 1914 Auto 1915 Auto 1916 Auto 1928 Marine 1948 1959 1961 1962 1968 2000 Auto 2014 2015 2016 2022 Auto 2023 Auto 2049 2050 2063 2071 2122 2146 2174 2175 Auto 2243 Auto 2249 Auto 2252 Auto 2253 Auto 2265 2268 2292 2296 2303 2305 Auto 2308 2346 2347 Auto 2349 2372 2373 2413 2417 2479 2530 2538 2868 2891 8085 8108 8208Choose by Piston Number:3802160 3802132 3802134 3802100 3802102 3802104 3802060 3802062 3802064 3802170 3802172 3802174 3802562 3802564 3802565 3802487 3802493 3802495 3802251 3802252 3802253 3802248 3802249 3802250 3802747 3802764 3802765 3802757 3802758 3802759If you are unsure what you need, send us your CPL or engine serial number and we can determine what piston to include.

Warranty Information

Overview

We stand behind every part we sell — new, rebuilt, or used. While RF Engine is not the manufacturer and cannot extend additional warranties, we do guarantee that each product will arrive as described, in usable condition, and free from material defects or misrepresentation.


Warranty Coverage

  • New Parts: Covered under the original manufacturer’s warranty. All terms and coverage are set by the manufacturer. Copies available upon request.
  • Rebuilt, Reconditioned, and Used Parts: Backed by an inspection-only warranty unless otherwise stated. As with new parts, RF Engine cannot provide further warranty coverage beyond the manufacturer’s terms.
  • No Additional Warranty: RF Engine does not offer any express or implied warranties. However, if an issue arises, we are here to assist and will support you through any applicable manufacturer claim process.

Our Guarantee

All parts are guaranteed to be in the condition stated at the time of sale and free from misrepresentation. If something isn’t right, we’ll work with you to resolve it — including returns, exchanges, or refunds when appropriate.

  • We sell parts — we don’t make them — but we stand behind what we sell.
  • Guaranteed to match the description or your money back.
  • Manufacturer’s warranty applies where available; we’ll help if you ever need it.

Used Parts — What to Expect

Used parts are cleaned, inspected, and guaranteed to be usable, but please note:

  • They often have signs of wear, surface rust, blemishes, or cosmetic imperfections.
  • They may include old gaskets or residue and likely require further cleaning or machining before installation.
  • They are not refurbished, remanufactured, or restored to like-new appearance.

We recommend careful inspection and strongly encourage installation by a qualified heavy-duty diesel mechanic.

  • Worn, not worn out — used parts may show signs of age but are fit for service.
  • All used parts are tested for usability, not appearance.

Questions?

If you have questions about a part’s condition, warranty, or how we handle returns and guarantees, feel free to contact us. We’re here to help.


Last Updated: June 22, 2025