View 2 Photos View 0 Videos New Caterpillar Injector Cup O-Ring for 3406E/C15/C16/C18, Part # 166-2903 Newly Listed $2.99 USD INJECTOR CUP O RING. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. PRICE PER O-RING. PICTURE REFERENCE # 5., Serial#: 166-2903, Core Charge: 0, Casting#: 166-2903 ConditionNewPart Number166-2903 321268Stock Number166-2903 MLS Number14545331CategoryEngine Miscellaneous Parts Last Updated8/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos New Caterpillar Injector Cup O-Ring for 3406E/C15/C16/C18, Part # 166-2904 321269 Newly Listed $2.99 USD INJECTOR CUP O RING. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. PRICE PER O-RING. PICTURE REFERENCE # 5., Serial#: 166-2904, Core Charge: 0, Casting#: 9X7430 ConditionNewPart Number166-2904 321269Stock Number166-2904 MLS Number14545330CategoryEngine Miscellaneous Parts Last Updated8/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar Injector Cup O-Ring for 3406E/C15/C16/C18, Part # 9X7430 Newly Listed $2.99 USD INJECTOR CUP O RING. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. PRICE PER O-RING. PICTURE REFERENCE # 7., Serial#: 321266, Core Charge: 0, Casting#: 9X7430 ConditionNewPart Number9X7430 321266Stock Number9X7430 MLS Number14545329CategoryEngine Miscellaneous Parts Last Updated8/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar 3406 Head Coolant Water Jacket Sleeve, Part # 3E6772 Newly Listed $8.16 USD 3406 HEAD COOLANT WATER JACKET SLEEVE. FITS MANY 3406 APPLICATIONS. REPLACES CAT PART # 3E6772. PICTURE REFERENCE # 24, Serial#: 3E6772, Core Charge: 0, Casting#: 3E6772 ConditionNewPart Number331254Stock Number331254 MLS Number14545328CategoryEngine Miscellaneous Parts Last Updated8/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar Fuel Injection O-Ring Kit for 3406E/C15/C16/C18 Engines, Part # 331241-150 Recently Updated $167.20 USD FUEL INJECTION O-RING KIT 331241-150 Caterpillar 3406E / C15 / C16 / C18 Series engine application DOES ALL 6 INJECTORS AND SLEEVES. 2481394(6) 0336042(2) 1H1023(4) 321318(1) 6V5050(10)... ConditionNewPart Number331241-150Stock Number331241-150 MLS Number13311514CategoryEngine Miscellaneous Parts Last Updated8/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar Thermostat Housing Gasket for 3406E/C15/C16/C18, Part # 4W4014 Newly Listed $3.75 USD THERMOSTAT HOUSING GASKET. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. REPLACES CAT 4W4014, Serial#: 4W4014, Core Charge: 0, Casting#: 4W4014 331283 ConditionNewPart Number4W4014Stock Number331283 MLS Number14542991CategoryEngine Miscellaneous Parts Last Updated8/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar Thermostat Housing Gasket 3406E/C15/C16/C18, Part # 9Y2588 Newly Listed $4.01 USD THERMOSTAT HOUSING GASKET. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. REPLACES CAT 9Y2588, Serial#: 9Y2588, Core Charge: 0, Casting#: 9Y2588 331284 ConditionNewPart Number9Y2588Stock Number9Y2588 MLS Number14542989CategoryEngine Miscellaneous Parts Last Updated8/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Caterpillar Thermostat Housing Gasket 3406E/C15/C16/C18 Single Thermostat, Part # 104-8585 Newly Listed $4.59 USD THERMOSTAT HOUSING GASKET. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. SINGLE THERMOSTAT STYLE REPLACES CAT 104-8585, Serial#: 104-8585, Core Charge: 0, Casting#: 104-8585 ConditionNewPart Number104-8585Stock Number331290 MLS Number14542987CategoryEngine Miscellaneous Parts Last Updated8/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar 3406 Aftercooler Gasket, Fits 3406A/B/C, Replaces CAT 2N8204, Part # 331300 Newly Listed $3.62 USD NEW AFTERCOOLER GASKET. FITS 3406 A BC. PRICE PER GASKET. REPLACES CAT 2N8204. PICTURE REFERENCE # 33, Serial#: NA, Core Charge: 0, Casting#: 2N8204 ConditionNewPart Number331300Stock Number331300 MLS Number14542986CategoryEngine Miscellaneous Parts Last Updated8/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Turbo Stud Nuts, Part # 168-7800 / 2N2766 / 3912167 / 3E8018 / 1681948C1 Newly Listed $2.03 USD TURBO STUD NUTS, FITS MANY CAT, CUMMINS AND INTERNATIONAL ENGINES . SEE CROSS NUMBERS:168-7800 2N2766 3912167 3E8018 1681948C1, Serial#: 340061, Core Charge: 0, Casting#: 168-7800 2N2766... ConditionNewPart Number168-7800 2N2766 3912167 3E8018 1681948C1Stock Number340061 MLS Number14536791CategoryEngine Miscellaneous Parts Last Updated8/12/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Caterpillar 3406E Front Structure Gasket Kit, Part # 234-1866 $245.77 USD NEW 3406E CATERPILLAR FRONT STRUCTURE GASKET KIT. CATERPILLAR 1127992 CATERPILLAR 125-2428 CATERPILLAR 1252428 CATERPILLAR 126-9506 CATERPILLAR 1269506 CATERPILLAR 129-0433... ConditionNewPart Number234-1866Stock Number331416 MLS Number13724799CategoryEngine Miscellaneous Parts Last Updated6/17/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Caterpillar Injector Cup Replacement Kit for 3406E C15 C16 C18, Part # 392091 $20.31 USD INJECTOR CUP REPLACEMENT KIT. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. PRICE PER INJECTOR CUP, NEED 6 PER ENGINE. PICTURE REFERENCE # 10 392087 CUP ONLY INJECTOR SLEEVE, Serial#:... ConditionNewPart Number392091 2634920 9X7430 1662904Stock Number392091 MLS Number10183138CategoryEngine Miscellaneous Parts Last Updated6/16/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar Head Bolt Kit for C15/C15 ACERT/3406E, Part # 340099 $384.70 USD NEW HEAD BOLT KIT, FITS C15 C15 ACERT AND 3406E. 1241855,1241854, 224-5126, Serial#: 340099, Core Charge: 0, Casting#: 340099 ConditionNewPart Number340099Stock Number340099 MLS Number14301673CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Caterpillar Thermostat Housing Gasket for 3406E/C15/C16/C18, Part # 139-3550 $3.95 USD THERMOSTAT HOUSING GASKET. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS. REPLACES CAT 139-3550, Serial#: 139-3550, Core Charge: 0, Casting#: 139-3550 ConditionNewPart Number139-3550Stock Number331347 MLS Number14236521CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Caterpillar 3406 Timing Cover Gasket, Part # 331399 / 1669146, Fits 3400 Series $23.15 USD NEW TIMING COVER GASKET PART # 331399 FITS CAT 3400 SERIES ENGINES, Serial#: NA ConditionNewPart Number331399 / 1669146Stock Number331399 MLS Number12655745CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar 3406B/C IPD Head Gasket Set, Part # 406063 $402.41 USD IPD HEAD GASKET SET, CONFIRM FITMENT WITH YOUR ENGINE SERIAL #., Serial#: 3406B/C, Core Charge: 0, Casting#: 406063 ConditionNewPart Number406063Stock Number406063 MLS Number12288593CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar 3406B-C15 Rod Bearing Set .010 Oversize, Part # 370018 9Y7735-010 $60.10 USD NEW ROD BEARING SET. EACH SET DOES 1 PISTON. FITS MOST 3406B-C15 NON ACERT ENGINES. OVERSIZED .010., Serial#: 6NZ 1LW 2KS, Core Charge: 0, Casting#: 370018 ConditionNewPart Number370018 9Y7735-010Stock Number370018 MLS Number11921070CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar 3406B/3406C Front Structure Gasket Kit, Part # 331409 $164.28 USD NEW FRONT STRUCTURE GASKET KIT. FITS MOST 3406B AND 3406C ENGINES. INCLUDES THE FOLLOWING 1006178 2W0459 446GC1109 1090078 4H6145 9H8872 1425867 4N0699 9L1633 146142 4N0933 1223772 4B2695... ConditionNewPart Number331409Stock Number331409 MLS Number11683131CategoryEngine Miscellaneous Parts Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Aftermarket Caterpillar 3406E/C15 Exhaust Rocker Arm, Part # 162-9175 $141.08 USD NEW AFTERMARKET EXHAUST ROCKER ARM. FITS MULTIPLE CAT 3406E AND C15 ENGINE MODELS., Serial#: 20R3321, Core Charge: 0, Casting#: 20R3321 ConditionNewPart Number162-9175 2038822 278-1364 2781364 4373869 3284240Stock NumberS-28473 MLS Number11182144CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Aftermarket Injector Rocker Arm for Caterpillar 3406E/C15, Part # 20R3322 $155.85 USD NEW AFTERMARKET INJECTOR ROCKER ARM. FITS MULTIPLE CAT 3406E AND C15 ENGINE MODELS. THESE ARE THE NEWER STYLES WHEN CHANGING FROM THE OLDER STYLE YOU MUST INCLUDE THE NEW STYLE ADJUSTER,... ConditionNewPart Number20R3322 2781365 1032051 10R-1136 10R1180 10R4707 192-8215 218-2741 278-1365 207-5248Stock NumberS-28405 MLS Number11182143CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar 3406E Thermostat, Part # 201737 2R2911 4N2212 4W4794 $19.99 USD NEW THERMOSTAT. FITS MULTIPLE APPLICATIONS. 180%, Serial#: ....., Core Charge: 0, Casting#: ..... ConditionNewPart Number201737 2R2911 4N2212 4W4794 6I4954 9N3711 5N6242Stock Number181830 MLS Number10748709CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos New Caterpillar 3406B Head Spacer Plate .339" Thickness, Part # 225-3100 / 2253100 / 360474 $616.24 USD NEW HEAD SPACER PLATE. FITS MULTIPLE CAT APPLICATIONS. MOST COMMON 3406B .339 THICKNESS, Serial#: 225-3100 2253100 360474, Core Charge: 0, Casting#: 225-3100 2253100 360474 ConditionNewPart Number225-3100 2253100 360474Stock Number360474 MLS Number10536145CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar Thermostat Housing Gasket for 3406E/C15/C16/C18, Part # 4N1156 $2.30 USD THERMOSTAT HOUSING GASKET. FITS MULTIPLE CAT 3406E C15 C16 C18 MODELS., Serial#: 4N1156, Core Charge: 0, Casting#: 4N1156 ConditionNewPart Number4N1156Stock Number331285 MLS Number10183137CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Caterpillar Primer Pump Hand, 3300 Series Application, Part # 380151 137-5541 380151-100 331269 $45.31 USD Primer Pump Hand Caterpillar 3300 Series application, Serial#: 380151 137-5541 380151-100 331269, Core Charge: 0, Casting#: 380151 137-5541 380151-100 331269 ConditionNewPart Number380151 137-5541 380151-100 331269Stock Number380151 MLS Number10122493CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos New Exhaust Manifold Gasket Fits Caterpillar 3406A/B/C, Part # 129-9452 $3.99 USD NEW EXHAUST MANIFOLD GASKET. FITS CATERPILLAR 3406 A /B /C. TAKES 6 TO DO COMPLETE INSTALLATION., Serial#: 129-9452, Core Charge: 0, Casting#: 129-9452 ConditionNewPart Number129-9452 1052873 7W5978 7W9108 9Y4582Stock Number331291 MLS Number9915505CategoryEngine Miscellaneous Parts Last Updated5/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info