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3406742 | Cummins N14 Flat Deck Cylinder Head, Remanufactured

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Shipping: Free shipping applies to commercial addresses within the continental United States only. Freight carriers charge an additional $100.00 for residential addresses.
Pricing: $691.68

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Is your Cylinder Head in it for the long haul?

We all know in order to get a million of miles out of your engine you need to keep your engine cool, well lubricated, and perform regular maintenance. Let one of these slip... and your rig is going to wind up in the shop with you stuck waiting for the repair.

It's no secret that diesel engine parts can cost an arm and a leg. That’s where HHP steps in; we offer premium aftermarket parts at up to 50% off OEM prices. While most believe aftermarket retailers sell cheap parts with zero warranty, packed in a beat-up box from who knows where, HHP is here to kick that stereotype to the curb. HHP provides Cylinder Heads with additional engine cooling properties and a 1-year warranty. How’s that for an aftermarket part?

Need a little extra proof? Let's talk Cylinder Heads.

  • Why buy new, when you can buy remanufactured and save? This cylinder head is magnafluxed to detect cracks, then furnace welded if needed. Under lower limit heads are thermal cast, 100% air decay and wet tested, and finished by chasing the threads and providing a machined finish.

  • Hand reassembled and thoroughly checked, this Cylinder Head includes everything you need to go another million miles.


  • (1) Cylinder Head


  • 1 year warranty. First 6 months, parts and labor (maximum $45/hr no premium, overtime or holiday rates).
  • Second 6 months, parts itself.

OEM Applications

  • 3078360
  • 3078380
  • 3084060
  • 3084981
  • 3406739
  • 3406742
  • 3411814
  • 3411817

Technical Data

Product Dimensions: 14x10x8

New Thickness/MeasuredAt: 4.387"
Minimum Thickness: 4.3600"
Warp Spec: .003" Overall
Injector Tip Protrusion: .0580-.0720"
* Check Valve Angles, Different Combinations Used For Select 1, 2 Or 3 - Intakes 20 & 30° And Exhausts Are 30 + 45°.

Stem Diameter: .3775-.3793"
Angle: 19.5°
Margin: .114” Min
Recession: .000-.025” V/Rec

Stem Diameter: .3775-.3793"
Angle: 29.5°
Margin : .114” Min
Recession: .000-.025” V/Rec

Valve Guide Information
Guide Height 1.2500-1.2900”
Guide Clearance: 0031”

Guide Height 1.2500-1.2900”
Guide Clearance: .0031"

Valve Seat Information
Seat Width: .063-.125"
Seat Angle: 20°
Seat Inside Diameter: 1.9995-2.0005”
Seat Insert Bore Depth: .370-.375”

Seat Width: .063-.125”
Seat Angle: 30°
Seat Inside Diameter: 1.9995-2.0005”
Seat Insert Bore Depth: .370-.375”

Valve Spring (Outer Or Single Spring)
Free Length: 3.460"
Installed Height: 2.810"
Open Test Press: 255# @ 2.240"
Close Test Press: 120# @ 2.810"
Free Length: 3.460”
Installed Height: 2.810”
Open Test Press: 255# @ 2.240”
Close Test Press: 120# @ 2.810”

Rocker Shaft
Shaft Diameter: 1.3710-1.3725"
Bore Diameter: 1.3735-1.3765"

Intake Valve Lash: .014" Cold
Exhaust Valve Lash: .027" Cold
Lash Adjustment Method: Adjusting Screw
Cyl Head Torque: 100, 220, 220 Ft/Lbs, + 90°


Shipping Information

  • Item Requires Shipping
  • 95.0 lbs.
  • W10.5000” x H10.0000” x L15.0000”
  • Free Shipping!
  • Free shipping applies to commercial addresses within the continental United States only. Freight carriers charge an additional $100.00 for residential addresses.

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