My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Cometic C5666-040 Ford Series MLS Cylinder Head Gasket Bore - 385 4.400

(Ford F-150 1975-79, Mustang 1970-71, F-250 1973-79, 1983-96, Thunderbird 1968-76, F-350 1973-79, 1983-97, Galaxie 500 1969-74 + 32 more models)

Part of: Cometic Ford Series MLS Cylinder Head Gasket Bore Thick

Other options in this family: Cometic C5667-060 Cometic C5667-070 Cometic C5667-040 Cometic C5668-051 Cometic C5668-040

Manufacturer

Picture for manufacturer Cometic

Part Number

C5666-040
7 reviews
Sale Price

$104.31

2 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Cometic C5666-040 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Ford 385 Series big block engines. This high-performance gasket features a 4.400-inch bore diameter and .040-inch compressed thickness, making it ideal for performance builds and engine rebuilds requiring precise sealing and durability.

Key Features:

  • Multi-Layer Steel (MLS) construction for superior sealing and strength
  • .040-inch compressed gasket thickness for optimized compression ratio
  • 4.400-inch bore diameter designed for Ford 385 Series applications
  • Advanced material technology prevents leaks under extreme cylinder pressures
  • Reusable design allows for easier disassembly and reassembly
  • Resists corrosion and maintains integrity in high-heat environments

Cometic MLS gaskets feature multiple layers of stainless steel with elastomeric coatings that provide exceptional conformability to sealing surfaces. This construction allows the gasket to recover and seal effectively even after repeated heat cycles, making it an excellent choice for street performance, racing, and forced induction applications. The Ford 385 Series includes popular engine variants such as the 429 and 460 cubic inch big blocks.

Products specifications

Fits

Ford F-150 1975-79, Mustang 1970-71, F-250 1973-79, 1983-96, Thunderbird 1968-76, F-350 1973-79, 1983-97, Galaxie 500 1969-74, F-100 1973-74, 1979, Fairlane 1970, Ranchero 1970-77, Torino 1970-76, Falcon 1970, E-350 Econoline 1975-96 + 26 more models

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Material

Multi-layer Steel

They had the lowest price by far! Quick shipment! I am going back for more. Thanks!<br><br>Order 6489

Great pricing!! cheapest products on the web!

Your competitive pricing won my business through the internet and I wasn't disappointed. The price was great ( about 1/2 MSRP) and item was shipped very quickly. No backorder problems here! I was impressed with the quality of my H pipe and with the packaging.

Amazing! Product was exactly as described, price was excellent, and shipping was extremely fast. Will buy from again!!

Autoplicity leads the way ! Others take a lesson !! Great prices and excellent service !!!

I only gave them a 3 star raring on their shipping because I went on their site on Tuesday and the order said it had not been shipped. On Wednesday I received my shipment. The left hand needs to figure out what the right hand is doing. Other than that, GREAT

Fast shipping and good prices. I would shop this site again.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy