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Jacobs Exhaust Brake for Cummins Medium Duty Engines (Non-Dodge Applications)   

More Control. Every™ Stop.

Cummins E Brake uses engine exhaust backpressure to increase your vehicle's stopping ability significantly. By restricting the flow of exhaust gases, it creates resistance against the pistons on every stroke. This, in turn, slows the rotation of the crankshaft and your vehicle.

With Cummins E Brake, your engine (B5.9, ISB, C8.3, ISC or ISL) creates up to 237 hp of retarding power to help you slow down. You use your service brakes less so they last up to three times longer. And having more braking power on long, steep hills can help reduce the risk of overheating and glazing.

With every Cummins E Brake you get:

  • Increased control on steep grades
  • Increased brake life
  • Lower vehicle operating costs
  • Tamperproof design for consistent performance every time
  • Cummins nationwide warranty
  • The largest diesel service and parts network in North America

How Much Braking Horsepower Will I Get?

The higher the engine rpm, the more braking power you get. The chart below shows retarding power in horsepower.

                B5.9  ISB  C8.3  ISC ISL
1400 RPM  34  48  50  61  67 
1600 RPM 46 62 68 80 87
1800 RPM 59 77 89 99 111
2000 RPM 75 84 112 124 137
2200 RPM 96 106 136 151 164
2400 RPM 113 121 160 178 190
2600 RPM 134 136 192 205 218
2800 RPM 159 152 223 237 -

Every™ Question. Answered.

Cummins E Brake is the product of a joint venture between Cummins Inc., a world leader in diesel technology - and Jacobs Vehicle Systems, Inc., the recognized leader in retarding technology. For more information about the Cummins E Brake, see your local dealer or Cummins distributor, call 1-800-CUMMINS™ (1-800-286-6467) or visit our web site at www.cumminsengines.com.

Exhaust Brake Kits For Cummins Medium-Duty Engines (Non-Dodge Applications) - Effective March 1, 2016.

Engine Model Build Year Brake Configuration Base Kit Pneumatic Group Pneumatic Group w/ Air Supply
B5.9 Mechanical Pre-1998 In-Pipe 3802671 3803910 3802673
ISB CM550 1998-2002 Turbo Mount Half-Marmon 3800442 3806238 3806237
ISB CM550 1998-2002 Turbo Mount Full-Marmon 3800443 3806238 3806237
ISB CM550 1998-2002 In-Pipe 3800441 3806238 3806237
ISB CM850* 2002-Till Date Turbo Mount Full-Marmon 4089591 3806238 3806237
ISB CM850* 2002-Till Date In-Pipe 4089593 3806238 3806237
ISB 6.7L
CM850/2150
Euro 4 (24V) In-Pipe 4352554 3284526 N/A 
ISB 6.7L
CM850/2150
Euro 5 (24V) In-Pipe 4337608 3284526 N/A
C8.3 Mechanical Pre-1998 In-Pipe 3802672 3803910 3802673
ISC ISL CM550 1998-2003 Turbo Mount Half-Marmon 3800414 3806238 3806237
ISC ISL CM550 1998-2003 Turbo Mount Full-Marmon 3800415 3806238 3806237
ISC ISL CM550 1998-2003 In-Pipe 3800372 3806238 3806237
ISC ISL CM850 2003-Till Date Turbo Mount Full-Marmon 4089624 3806238 3806237
ISC ISL CM850 2003-Till Date In-Pipe 4089623 3806238 3806237
Compressed Air Cyl Replacement Kit - All Medium Duty 4024995 - -

* For use on engines with wastegate turbos only.  

Note: Exhaust braking is an integral function  of the VG turbo on ISC/ISL/ISB CM2150.  Additional exhaust brakes are not allowed.

Bulletin: 4081574

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