360466 | NEW CATERPILLAR SPACER PLATE 3406E / C15 / C16 / C18 SERIES A

Premium New Spacer Plate for Caterpillar 3406E / C15 / C16 / C18 Engines – 360466
OEM Reference: 6I4421

When it comes to heavy-duty engine assembly, precision and durability start at the base. This premium CAT spacer plate is designed for 3406E, C15, C16, and C18 series engines — offering unmatched flatness, sealing surface quality, and heat resistance for long-term reliability.

Manufactured from high-strength steel and precision-machined to meet OEM+ tolerances, this spacer plate ensures proper gasket seating, block-to-head alignment, and oil flow control — outperforming cheaper stamped or poorly finished aftermarket alternatives.

Fits: CAT 3406E, C15, C16, and C18 diesel engines
Part number: 360466
OEM reference: 6I4421
Brand new: 100% new — no reconditioned or remanufactured material
Premium steel construction: Built to resist warping, corrosion, and heat-related fatigue
Precision machining: Ensures a perfect seal and proper fit during head installation
OEM+ flatness specs: Minimizes risk of head gasket failure
Ready to install: Direct replacement — no modifications required
Ideal for: Engine overhauls, rebuilds, performance upgrades, and industrial repairs

For serious engine builds, choose a spacer plate that delivers unmatched reliability, longevity, and precision.

DESCRIPTION:	SPACER PLATE
SKU:	360466
OEM:	6I4421
PRODUCT GROUP:	ENGINE PARTS
UPC CODE:	193807048525
SELL PACK:	1 EACH
WEIGHT:	17.30 LBS
PKG SIZE:	44 x 13 x 1 inches

Weight	9.072 kg
Dimensions

We offer free standard ground shipping within the USA! If you need your parts in a hurry and would like to get them overnighted or expedited, please give us a call !

NOTE - CUT OFF TIME FOR SAME DAY SHIPPING IS 3PM CENTRAL TIME. ORDERS PLACED AFTER 3PM WILL SHIP OUT NEXT BUSINESS DAY. NEXTDAY SHIPMENTS THAT DO NOT ARRIVE ON TIME ARE NON-REFUNDABLE.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

NOTE - All open orders will have a 20% restocking fee. All returns will have a shipping fee.

1 YEAR WARRANTY

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360466 | NEW CATERPILLAR SPACER PLATE 3406E / C15 / C16 / C18 SERIES APPLICATION. | OEM# 6I4421

$399.99

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This \u003cstrong data-start=\"618\" data-end=\"646\"\u003epremium CAT spacer plate\u003c\/strong\u003e is designed for 3406E, C15, C16, and C18 series engines — offering unmatched flatness, sealing surface quality, and heat resistance for long-term reliability.\u003c\/p\u003e\n\u003cp data-start=\"807\" data-end=\"1072\" class=\"\"\u003eManufactured from \u003cstrong data-start=\"825\" data-end=\"848\"\u003ehigh-strength steel\u003c\/strong\u003e and precision-machined to meet \u003cstrong data-start=\"880\" data-end=\"899\"\u003eOEM+ tolerances\u003c\/strong\u003e, this spacer plate ensures proper gasket seating, block-to-head alignment, and oil flow control — outperforming cheaper stamped or poorly finished aftermarket alternatives.\u003c\/p\u003e\n\u003cul data-start=\"1074\" data-end=\"1682\"\u003e\n\u003cli data-start=\"1074\" data-end=\"1131\" class=\"\"\u003e\n\u003cp data-start=\"1076\" data-end=\"1131\" class=\"\"\u003e\u003cstrong data-start=\"1076\" data-end=\"1084\"\u003eFits\u003c\/strong\u003e: CAT 3406E, C15, C16, and C18 diesel engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1132\" data-end=\"1159\" class=\"\"\u003e\n\u003cp data-start=\"1134\" data-end=\"1159\" class=\"\"\u003e\u003cstrong data-start=\"1134\" data-end=\"1149\"\u003ePart number\u003c\/strong\u003e: 360466\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1160\" data-end=\"1189\" class=\"\"\u003e\n\u003cp data-start=\"1162\" data-end=\"1189\" class=\"\"\u003e\u003cstrong data-start=\"1162\" data-end=\"1179\"\u003eOEM reference\u003c\/strong\u003e: 6I4421\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1263\" class=\"\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1263\" class=\"\"\u003e\u003cstrong data-start=\"1192\" data-end=\"1205\"\u003eBrand new\u003c\/strong\u003e: 100% new — no reconditioned or remanufactured material\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1264\" data-end=\"1360\" class=\"\"\u003e\n\u003cp data-start=\"1266\" data-end=\"1360\" class=\"\"\u003e\u003cstrong data-start=\"1266\" data-end=\"1296\"\u003ePremium steel construction\u003c\/strong\u003e: Built to resist warping, corrosion, and heat-related fatigue\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1361\" data-end=\"1452\" class=\"\"\u003e\n\u003cp data-start=\"1363\" data-end=\"1452\" class=\"\"\u003e\u003cstrong data-start=\"1363\" data-end=\"1386\"\u003ePrecision machining\u003c\/strong\u003e: Ensures a perfect seal and proper fit during head installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1453\" data-end=\"1519\" class=\"\"\u003e\n\u003cp data-start=\"1455\" data-end=\"1519\" class=\"\"\u003e\u003cstrong data-start=\"1455\" data-end=\"1478\"\u003eOEM+ flatness specs\u003c\/strong\u003e: Minimizes risk of head gasket failure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1520\" data-end=\"1592\" class=\"\"\u003e\n\u003cp data-start=\"1522\" data-end=\"1592\" class=\"\"\u003e\u003cstrong data-start=\"1522\" data-end=\"1542\"\u003eReady to install\u003c\/strong\u003e: Direct replacement — no modifications required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1593\" data-end=\"1682\" class=\"\"\u003e\n\u003cp data-start=\"1595\" data-end=\"1682\" class=\"\"\u003e\u003cstrong data-start=\"1595\" data-end=\"1608\"\u003eIdeal for\u003c\/strong\u003e: Engine overhauls, rebuilds, performance upgrades, and industrial repairs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1684\" data-end=\"1799\" class=\"\"\u003e\u003cstrong data-start=\"1684\" data-end=\"1799\"\u003eFor serious engine builds, choose a spacer plate that delivers unmatched reliability, longevity, and precision.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-sm attributes mb-0\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eDESCRIPTION:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003eSPACER PLATE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eSKU:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e360466\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eOEM:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e6I4421\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003ePRODUCT GROUP:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003eENGINE PARTS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eUPC CODE:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e193807048525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eSELL PACK:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e1 EACH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eWEIGHT:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e17.30 LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003ePKG SIZE:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e44 x 13 x 1 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","published_at":"2024-01-10T10:09:29-06:00","created_at":"2024-01-10T10:09:29-06:00","vendor":"TTM Diesel","type":"","tags":["Cylinder Head \u0026 Components"],"price":39999,"price_min":39999,"price_max":39999,"available":true,"price_varies":false,"compare_at_price":48000,"compare_at_price_min":48000,"compare_at_price_max":48000,"compare_at_price_varies":false,"variants":[{"id":44263415054548,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"69-J6I4421","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"360466 | NEW CATERPILLAR SPACER PLATE 3406E \/ C15 \/ C16 \/ C18 SERIES APPLICATION. | OEM# 6I4421","public_title":null,"options":["Default Title"],"price":39999,"weight":9072,"compare_at_price":48000,"inventory_management":null,"barcode":"00810147608515","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/ttmdiesel.com\/cdn\/shop\/files\/360466_G.png?v=1721071475"],"featured_image":"\/\/ttmdiesel.com\/cdn\/shop\/files\/360466_G.png?v=1721071475","options":["Title"],"media":[{"alt":null,"id":34037102706900,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/ttmdiesel.com\/cdn\/shop\/files\/360466_G.png?v=1721071475"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/ttmdiesel.com\/cdn\/shop\/files\/360466_G.png?v=1721071475","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp data-start=\"405\" data-end=\"518\" class=\"\"\u003e\u003cstrong data-start=\"405\" data-end=\"490\"\u003ePremium New Spacer Plate for Caterpillar 3406E \/ C15 \/ C16 \/ C18 Engines – 360466\u003c\/strong\u003e\u003cbr data-start=\"490\" data-end=\"493\"\u003e\u003cstrong data-start=\"493\" data-end=\"518\"\u003eOEM Reference: 6I4421\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"520\" data-end=\"805\" class=\"\"\u003eWhen it comes to heavy-duty engine assembly, \u003cstrong data-start=\"565\" data-end=\"611\"\u003eprecision and durability start at the base\u003c\/strong\u003e. This \u003cstrong data-start=\"618\" data-end=\"646\"\u003epremium CAT spacer plate\u003c\/strong\u003e is designed for 3406E, C15, C16, and C18 series engines — offering unmatched flatness, sealing surface quality, and heat resistance for long-term reliability.\u003c\/p\u003e\n\u003cp data-start=\"807\" data-end=\"1072\" class=\"\"\u003eManufactured from \u003cstrong data-start=\"825\" data-end=\"848\"\u003ehigh-strength steel\u003c\/strong\u003e and precision-machined to meet \u003cstrong data-start=\"880\" data-end=\"899\"\u003eOEM+ tolerances\u003c\/strong\u003e, this spacer plate ensures proper gasket seating, block-to-head alignment, and oil flow control — outperforming cheaper stamped or poorly finished aftermarket alternatives.\u003c\/p\u003e\n\u003cul data-start=\"1074\" data-end=\"1682\"\u003e\n\u003cli data-start=\"1074\" data-end=\"1131\" class=\"\"\u003e\n\u003cp data-start=\"1076\" data-end=\"1131\" class=\"\"\u003e\u003cstrong data-start=\"1076\" data-end=\"1084\"\u003eFits\u003c\/strong\u003e: CAT 3406E, C15, C16, and C18 diesel engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1132\" data-end=\"1159\" class=\"\"\u003e\n\u003cp data-start=\"1134\" data-end=\"1159\" class=\"\"\u003e\u003cstrong data-start=\"1134\" data-end=\"1149\"\u003ePart number\u003c\/strong\u003e: 360466\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1160\" data-end=\"1189\" class=\"\"\u003e\n\u003cp data-start=\"1162\" data-end=\"1189\" class=\"\"\u003e\u003cstrong data-start=\"1162\" data-end=\"1179\"\u003eOEM reference\u003c\/strong\u003e: 6I4421\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1263\" class=\"\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1263\" class=\"\"\u003e\u003cstrong data-start=\"1192\" data-end=\"1205\"\u003eBrand new\u003c\/strong\u003e: 100% new — no reconditioned or remanufactured material\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1264\" data-end=\"1360\" class=\"\"\u003e\n\u003cp data-start=\"1266\" data-end=\"1360\" class=\"\"\u003e\u003cstrong data-start=\"1266\" data-end=\"1296\"\u003ePremium steel construction\u003c\/strong\u003e: Built to resist warping, corrosion, and heat-related fatigue\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1361\" data-end=\"1452\" class=\"\"\u003e\n\u003cp data-start=\"1363\" data-end=\"1452\" class=\"\"\u003e\u003cstrong data-start=\"1363\" data-end=\"1386\"\u003ePrecision machining\u003c\/strong\u003e: Ensures a perfect seal and proper fit during head installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1453\" data-end=\"1519\" class=\"\"\u003e\n\u003cp data-start=\"1455\" data-end=\"1519\" class=\"\"\u003e\u003cstrong data-start=\"1455\" data-end=\"1478\"\u003eOEM+ flatness specs\u003c\/strong\u003e: Minimizes risk of head gasket failure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1520\" data-end=\"1592\" class=\"\"\u003e\n\u003cp data-start=\"1522\" data-end=\"1592\" class=\"\"\u003e\u003cstrong data-start=\"1522\" data-end=\"1542\"\u003eReady to install\u003c\/strong\u003e: Direct replacement — no modifications required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1593\" data-end=\"1682\" class=\"\"\u003e\n\u003cp data-start=\"1595\" data-end=\"1682\" class=\"\"\u003e\u003cstrong data-start=\"1595\" data-end=\"1608\"\u003eIdeal for\u003c\/strong\u003e: Engine overhauls, rebuilds, performance upgrades, and industrial repairs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1684\" data-end=\"1799\" class=\"\"\u003e\u003cstrong data-start=\"1684\" data-end=\"1799\"\u003eFor serious engine builds, choose a spacer plate that delivers unmatched reliability, longevity, and precision.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-sm attributes mb-0\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eDESCRIPTION:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003eSPACER PLATE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eSKU:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e360466\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eOEM:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e6I4421\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003ePRODUCT GROUP:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003eENGINE PARTS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eUPC CODE:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e193807048525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eSELL PACK:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e1 EACH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003eWEIGHT:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e17.30 LBS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"d-flex\"\u003e\n\u003cth class=\"text-uppercase col-5\"\u003ePKG SIZE:\u003c\/th\u003e\n\u003ctd class=\"col-7\"\u003e44 x 13 x 1 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e"}

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360466 | NEW CATERPILLAR SPACER PLATE 3406E / C15 / C16 / C18 SERIES APPLICATION. | OEM# 6I4421

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360466 | NEW CATERPILLAR SPACER PLATE 3406E / C15 / C16 / C18 SERIES APPLICATION. | OEM# 6I4421

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