The Cometic 2012+ VW/Audi 2.0L 83mm .040 inch MLS Head Gasket is intended for the verified vehicle applications listed below. Match manufacturer part number C4978-040, exact engine family, bore, thickness, material, sealing surfaces, fasteners, and every product note before ordering.
Key Features
- The Cometic MLS gasket is comprised of three to five layers of stainless steel.
- Cometic uses stainless steel for increased strength, its ability to rebound and resist corrosion.
- The outer layers of the gasket are embossed and coated on both sides with a Viton rubber material designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.
- The Viton coating is heat resistant to 250°C or 482°F.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2012-2013 | Audi | A3 | Base |
| 2017-2018 | Audi | A3 | Premium |
| 2017-2018 | Audi | A3 | Premium Plus |
| 2017-2018 | Audi | A3 | Prestige |
| 2012-2013 | Audi | A3 Quattro | Base |
| 2015-2018 | Audi | A3 Quattro | Premium |
| 2015-2018 | Audi | A3 Quattro | Premium Plus |
| 2015-2018 | Audi | A3 Quattro | Prestige |
| 2012-2018 | Audi | Q5 | Premium |
| 2012-2018 | Audi | Q5 | Premium Plus |
| 2018 | Audi | Q5 | Prestige |
| 2014-2018 | Audi | TT Quattro | Base |
| 2012-2013 | Audi | TT Quattro | Premium Plus |
| 2012-2013 | Audi | TT Quattro | Prestige |
| 2012-2018 | Audi | TTS Quattro | Base |
| 2015-2018 | Audi | A4 Quattro | Premium |
| 2015-2018 | Audi | A4 Quattro | Premium Plus |
| 2015 | Audi | A4 Quattro | Prestige |
| 2017-2018 | Audi | A4 Quattro | Prestige |
| 2012-2014 | Audi | A5 | Cabriolet |
| 2012-2014 | Audi | A5 Quattro | Base |
| 2012-2014 | Audi | A5 Quattro | Cabriolet |
| 2015-2018 | Audi | A4 | Premium |
| 2015-2018 | Audi | A4 | Premium Plus |
| 2015 | Audi | A4 | Prestige |
| 2017-2018 | Audi | A4 | Prestige |
| 2017-2018 | Audi | A4 allroad | Premium |
| 2017-2018 | Audi | A4 allroad | Premium Plus |
| 2017-2018 | Audi | A4 allroad | Prestige |
| 2012 | Audi | A4 Quattro | Avant |
| 2018-2019 | Audi | A5 Quattro | Premium |
| 2015-2016 | Audi | A5 Quattro | Premium Plus |
| 2018-2019 | Audi | A5 Quattro | Premium Plus |
| 2015 | Audi | A5 Quattro | Prestige |
| 2018-2019 | Audi | A5 Quattro | Prestige |
| 2017 | Audi | A5 Quattro | Sport |
| 2018-2019 | Audi | A5 Sportback | Premium |
| 2018-2019 | Audi | A5 Sportback | Prestige |
| 2017-2018 | Audi | Q3 | Premium |
| 2015-2018 | Audi | Q3 | Premium Plus |
| 2015-2017 | Audi | Q3 | Prestige |
| 2017-2018 | Audi | Q3 Quattro | Premium |
| 2015-2018 | Audi | Q3 Quattro | Premium Plus |
| 2015-2017 | Audi | Q3 Quattro | Prestige |
Specifications
| Manufacturer | Cometic Gasket |
|---|---|
| Manufacturer Part Number | C4978-040 |
| Product Type | Head Gaskets |
| Fitment Type | Vehicle specific, verify engine configuration |
What's Included
One new Cometic gasket product in the exact configuration and quantity identified by manufacturer part number C4978-040. Fasteners, sealants, fluids, companion gaskets, tools, and related engine components are included only when expressly stated for this exact part number.
About Cometic Gasket
Cometic develops sealing products for automotive and powersports engine applications. Correct selection remains exact-engine, exact-dimension, exact-material, exact-interface, and exact-part-number specific.
Related Cometic Gasket Products
- Cometic Honda F20/22C1 S2000 88mm .040 inch MLS 2.0L Head Gasket
- Cometic VW / Audi 1800/2000cc 83mm .060 inch MLS Head Gasket
- Cometic VW Golf/GTI/Jetta/Passat Audi A3/A4/A6/TT 2.0L 16V 83.5mm .086in MLS Head Gasket
Browse the Cometic Gasket collection for related head, intake, exhaust, valve-cover, and engine gasket products.
Frequently Asked Questions
Will this Cometic gasket fit my 2012-2013 Audi A3 Base?
That application is listed, but confirm the exact engine, bore, gasket thickness, material, sealing-surface requirements, and manufacturer part number before ordering.
Can I choose gasket thickness by vehicle alone?
No. Confirm the exact engine build, bore, deck and head condition, installed clearances, compression target, and manufacturer instructions before selecting thickness.
Do the sealing surfaces need preparation?
Yes. Follow the current Cometic and engine-builder requirements for surface finish, flatness, cleanliness, fasteners, torque procedure, and any specified sealant.
Installation Instructions
Follow the current Cometic and engine-manufacturer instructions for this exact part number. Verify surface finish, flatness, cleanliness, orientation, fasteners, torque sequence, torque values, sealant requirements, clearances, and fluid procedures before assembly. Inspect and test the completed repair before full-load operation.
Cometic Gasket
Shop Cometic head gaskets, gasket kits, and engine sealing components by exact manufacturer part number, verified vehicle application, and required engine-build specifications.Choosing the Correct Cometic Gasket Match the complete year, make, model, and application when listed Confirm engine family, bore, gasket thickness, material, and sealing surfaces Verify port shape, bolt pattern, coating, included quantity, and fastener requirements Use the exact Cometic part number to distinguish similar configurations Frequently Asked QuestionsCan I select a head gasket by vehicle alone?No. Also confirm the exact engine, bore, compressed thickness, material, deck and head condition, fasteners, and manufacturer part number.Does gasket thickness affect the engine build?Yes. Thickness can affect installed clearances, compression ratio, and quench. Use measured build data and qualified engine-builder guidance rather than vehicle fitment alone.What surface preparation is required?Follow the curre...
View Cometic Gasket Products
Engine
Shop automotive engine parts, cooling-system components, oil-system upgrades, ignition parts, pulleys, sensors, gaskets, fuel components, and engine-bay accessories at Black Ops Auto Works. This collection covers vehicle-specific replacement parts, performance upgrades, supporting hardware, and universal components for street cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and motorsport applications. Engine Parts and Performance Components The Engine collection brings together components used throughout the engine, lubrication system, cooling system, ignition system, fuel system, crankcase ventilation, accessory drive, and engine compartment. Available products range from replacement sensors and gaskets to rotating-assembly parts, performance cooling systems, supercharger pulleys, catch cans, cylinder heads, camshafts, intake manifolds, and engine-bay dress-up components. Engine compatibility cannot be determined from vehicle model alone. Confirm the exact year, make, ...
View Engine Products
Head Components
Cylinder head components and engine internals for performance builds and OE service are stocked at Black Ops Auto Works. Shop complete cylinder heads, head gaskets, head stud and bolt kits, rocker arms, lifters, camshaft and lifter kits, rotating assemblies, and main stud and bolt kits for LS, LT, HEMI 5.7/6.1/6.4, Coyote, Cummins, Powerstroke, VW/Audi turbo, Subaru, Nissan, and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 972 Head Components SKUs across component type, engine platform, and bore or gasket specification. What This Collection Covers Head Components groups together the parts that live at and around the cylinder head, the area of the engine most affected by heat, combustion pressure, and clamping load. This includes complete heads, head gaskets, head studs and bolts, rocker arms, lifters, camshaft and lifter kits, main stud and bolt kits, and ro...
View Head Components Products
Head Gaskets
Head gaskets for HEMI Hellcat, GM LS and LSX, Nissan RB26DETT and SR20, Subaru EJ series, BMW S58 and B58, VW/Audi turbo four cylinders, and Dodge Viper platforms are stocked at Black Ops Auto Works. Shop multi layer steel head gaskets, top end gasket kits, and bore and thickness specific gaskets from Cometic and HKS for street, track, and forced induction builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 601 Head Gaskets SKUs across bore size, gasket thickness, and platform specific categories. What This Category Covers The Head Gaskets category groups together the sealing components that sit between the cylinder head and engine block, along with related top end gasket kits. Coverage spans multi layer steel (MLS) head gaskets, DST cylinder head gaskets in multiple thickness options, top end gasket kits that include valve cover and intake gaskets, and application specific ...
View Head Gaskets Products


