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Gaskets and Seals› Engine Gaskets and Seals
Cometic Gasket
4.200 MLS Head Gasket .040 - SBC
SKU: C006 H1076SPK040XP
Advanced — 4+ hours
Overview
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Vehicle Symptoms
- Engine overheating under load
- Coolant loss without visible leaks
- White smoke from exhaust on startup
- Rough idle or misfire when warm
- Milky oil on dipstick
Diagnostic Codes
- P0300 – Random or multiple cylinder misfire Det
- P0301 – Cylinder 1 misfire Det
- P0302 – Cylinder 2 misfire Det
- P0303 – Cylinder 3 misfire Det
- P0304 – Cylinder 4 misfire Det
- P0305 – Cylinder 5 misfire Det
- P0306 – Cylinder 6 misfire Det
- P0128 – Coolant Thermostat Temp Below Regulating Temp
- P0217 – Engine Coolant Overtemperature Condition
Relevant Conversations
- SBC head gasket blown symptoms and repair cost
- Cometic MLS head gasket 4.200 bore 0.040 review
- P0300 random misfire caused by head gasket
- High performance head gasket for small block Chevy
- How to choose MLS head gasket thickness for boost
- Coolant in oil after head gasket replacement
- Best head gasket for 383 stroker SBC
- Cometic vs Fel-Pro head gasket comparison
- Will a 4.200 bore MLS gasket fit my 400 block
- Head gasket install tips for Cometic MLS
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Cometic Gasket |
| Part Number | C006 H1076SPK040XP |
Videos
PermaTorque MLS Head Gasket with NextGen Coating | Fel-Pro Gaskets
Reviewing Cometic's MLX Head Gaskets
Cometic MLS Head Gaskets
Understanding MLS Head Gaskets
Gasket Material and Surface Roughness—and How they Relate
Cometic Gaskets presented by J&P Cycles.
SEMA 2016: Cometic Gaskets at the Forefront of Gasket Technology
Which Direction Should You Install a Fel-Pro Gasket?
Inside Fel-Pro PermaTorque MLS Head Gaskets
Multi-Layer Steel (MLS) Head Gaskets | Victor Reinz®
About MOTORMIA
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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