Cummins CNG & LNG Engine Parts

We supply parts for Cummins engine series: L10, 5.9, 8.3C, 8.3C+, and 8.9 ISL-G.

Clean Energy Parts LLC. allows customers to order items "separately" – unlike the OEM.

Cummins logo with a large black letter 'C' and the word 'Cummins' inside the curve

Cummins Spreadsheet Parts List, click here.

Cummins Spark Plugs (Standard & Long Life)

Standard Life Spark Plugs

  • RC78PYP (#1208) — OEM: *

  • RC78WYP15 (#1221) — OEM: *

  • 4937472 — CEP: 11017

Long Life Spark Plugs

  • RC78WYP15 (#1221) — OEM: *

  • Kit 408986 — CEP: 1221-8.3 (Old P/N)

  • Kit 4955226 — CEP: 1221-8.3

  • Kit 4955720 — CEP: 1221-8.9

  • Kit 4955850 — CEP: 6128-8.9

  • Kit 4955851 — CEP: 6128-8.3


Cummins Spark Plug Kits (Engine-Specific)

  • 4089085 — CEP: 1208-L10

  • 4089086 — CEP: 1208-5.9

  • 4025416 — CEP: 1208-8.3 (Original Style)

  • 4955310 — CEP: 1208-8.3N (Current Style)

Cummins Spark Plug Kits (Engine-Specific)

  • 4089085 — CEP: 1208-L10

  • 4089086 — CEP: 1208-5.9

  • 4025416 — CEP: 1208-8.3 (Original Style)

  • 4955310 — CEP: 1208-8.3N (Current Style)

Ignition Components

Spark Plug Boots

  • 3973945 — CEP: 3973945 (New Style Black Coil)

  • 4989131 — CEP: 4989131

Ignition Leads (L10 Series)

  • 3606714 (26") — CEP: L10EXT-26

  • 3606715 (30") — CEP: L10EXT-30

  • 3606695 (14") — CEP: L10EXT-14R

  • 3606694 (22") — CEP: L10EXT-22R

  • 3606691 (15") — CEP: L10EXT-15

  • 3606692 (18") — CEP: L10EXT-18

Crankcase Ventilation Systems

  • 3607166 — CCV55248-08

  • CCV55248-1002 (HEF Model)

Oxygen Sensors (Cummins Gas Engines)

  • 4001675 (5-wire) — CEP: 400167502

  • 4954893 (4-wire) — CEP: 4954893

Fuel & Pressure Regulators (CNG Applications)

  • 6393609 (NABI) — HPNGV28114-3

  • Bus Mfg P/N — HPNGV28165-3

  • Bus Mfg P/N — HPNGV28114-1

Woodward Throttle Actuators

  • 3970809 — 8235-233

  • 3934701 (Original P/N) — 8235-206

  • 3970806 — 8235-206

  • 3975201 — 8235-207

  • 3970807 — 8235-245

  • PART DESCRIPTION OEM p/n CEP p/n

    Standard Life SparkPlug * RC78PYP #1208

    Long Life SparkPlug * RC78WYP15 #1221

    Long Life SparkPlug 4937472 11017

    Standard Life SparkPlug Kit 4089085 CEP 1208-L10

    Standard Life SparkPlug Kit 4089086 CEP 1208-5.9

    Standard Life SparkPlug Kit
    (Original style)‍ ‍ 4025416 CEP 1208-8.3

    Standard Life SparkPlug Kit
    (Current style) 4955310 CEP 1208-8.3N

    Long Life SparkPlug Kit (Old p/n) 408986 CEP 1221-8.3

    Long Life SparkPlug Kit (Old p/n) 4955226 CEP 1221-8.3

    Long Life SparkPlug Kit 4955720 CEP 1221-8.9

    Long Life SparkPlug Kit 4955850 CEP 6128-8.9

    Long Life SparkPlug Kit 4955851 CEP 6128-8.3


    Spark Plug Boot
    (NEW Style "Black" current coil) ‍ ‍3973945 CEP-3973945

    4989131 CEP-4989131

    L10 Series 1 - 26" Ignition Lead 3606714 CEP L10EXT-26

    L10 Series 1 - 30" Ignition Lead 3606715 CEP L10EXT-30

    L10 Series 2 - 14" Ignition Lead 3606695 CEP L10EXT-14R

    L10 Series 2 - 22" Ignition Lead 3606694 CEP L10EXT-22R

    L10 Series 3 - 15" Ignition Lead 3606691 CEP L10EXT-15

    L10 Series 3 - 18" Ignition Lead 3606692 CEP L10EXT-18

    Crank Case Ventilation filter assy 3607166 CCV55248-08

    Crank Case Ventilation filter assy (HEF) CCV55248-1002

    Oxygen Sensor - 5 wire 4001675 CEP-400167502

    Oxygen Sensor - 4 wire 4954893 CEP-4954893

    High Pressure Regulator - NABI 6393609 HPNGV28114-3

    High pressure Regulator Bus mfg p/n HPNGV28165-3

    High Pressure Regulator
    (Bus mfg provided) Bus mfg p/n HPNGV28114-1

    Woodward Throttle Actuator 3970809 8235-233

    Woodward Throttle Actuator
    (Original p/n) 3934701 8235-206

    Woodward Throttle Actuator 3970806 8235-206

    Woodward Throttle Actuator 3975201 8235-207

    Woodward Throttle Actuator 3970807 8235-245

Need Cummins Engine Parts?

We specialize in sourcing hard-to-find Cummins CNG and LNG engine components, including ignition systems, spark plugs, oxygen sensors, throttle actuators, and fuel system regulators. Contact Us for fast quoting and OEM cross-reference support.