Menu
Search
888.687.0539

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Search by Part Number Close
Shopping cart Close

You have no items in your shopping cart.

Menu Close
DS-3935449 Noise Isolator For Cummins Engines
DS-3935449 Noise Isolator For Cummins Engines
DS-3935449 Noise Isolator For Cummins Engines
DS-3935449 Noise Isolator For Cummins Engines
Picture of DS-3935449

DS-3935449 Noise Isolator For Cummins Engines

Compatible With 4BT3.9, 6BT5.9, ISB3.9, ISB4.5, QSB3.9, and QSB4.5 Engines

$1.43
i h
Item Guaranteed in Stock Hassle-Free Return Item

PRODUCT NOTES

Replaces old part number DS-3928406.

This is a Noise Isolator for Cummins 4BT3.9, 6BT5.9, ISB3.9, ISB4.5, QSB3.9 and QSB4.5 engines. This high quality aftermarket replacement part is guaranteed to meet OEM specifications and is shipped with a 12-month warranty.

Call us at 888.687.0539 with questions or buy online.
As always, your satisfaction is guaranteed!

Related products

DS-3907049

HEXAGON FLANGE HEAD CAP SCREW

$2.98

3935449
Hassle-Free Return Item

ISOLATOR,NOISE

Genuine Cummins Part

$7.20

DS-3930906
Hassle-Free Return Item

GASKET - 4BT / 6BT

$4.70

DS-3928759
Hassle-Free Return Item

GROMMET SEAL

$2.11

DS-4922219
Restocking Fee Applies

VALVE ROCKER COVER GASKET - K SERIES

$14.84

DS-3963983
Hassle-Free Return Item

SEALING WASHER - ISM11 / M11 / QSM11

$1.48

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
company information
Resources
Returns

Payment options

Complete your payment with a Visa card Complete your payment with a Master card Complete your payment with an American Express card Complete your payment using PayPal
Diesel Parts Direct BBB Business Review

Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

Copyright © 2025 Diesel Parts Direct. All rights reserved.
CID: 86714861