Product images and videos 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.
Gaskets and Seals› Engine Gaskets and Seals
Cometic Gasket
Cometic GM LS Gen-3/4 Small Block V8 .086in MLS Cylinder Head Gasket - 4.130in Bore
SKU: C006 C5317-086
Moderate — 2–4 hours
Overview
Show original supplier description
Part #: C5317-086
The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.
GM LS1/LS2/LS3/LS6 Gen-3/4 Small Block V8 .086in. MLS Cylinder Head Gasket | 4.130in. Bore
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Engine overheating under load
- White smoke from exhaust on startup
- Coolant loss without visible leaks
- Rough idle and misfire after warm-up
- Oil in coolant or coolant in oil
Diagnostic Codes
- P0300 – Random/multiple cylinder misfire Det
- P0301 – Cylinder 1 misfire Det
- P0302 – Cylinder 2 misfire Det
- P0303 – Cylinder 3 misfire Det
- P0304 – Cylinder 4 misfire Det
- P0128 – Coolant Thermostat Temp Below Regulating Temp
- P0217 – Engine Coolant Overtemperature Condition
Relevant Conversations
- LS head gasket blowing symptoms
- Cometic MLS head gasket 4.130 bore review
- GM LS cylinder head gasket replacement cost
- LS engine overheating after head gasket fix
- P0300 misfire after head gasket install
- Cometic C5317-086 vs stock LS gasket
- LS head gasket torque specs for MLS
- Best head gasket for boosted LS engine
- LS coolant in oil head gasket failure
- Where to buy Cometic head gasket C5317-086
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
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Cometic Gasket |
| Part Number | C006 C5317-086 |
Videos
Reviewing Cometic's MLX Head Gaskets
Cometic MLS Head Gaskets
Cometic Gasket failure
Choosing The Right Head Gasket For Your Performance Engine Application
Should You Use Copper Gasket Spray? | Tech Minute
Understanding MLS Head Gaskets
SCE Gaskets discusses the NEW MLS GS Gasket and Vulcan Cut Ring Head Gaskets
Gasket Material and Surface Roughness—and How they Relate
Performance Head Gaskets EXPLAINED!
SEMA 2016: Cometic Gaskets at the Forefront of Gasket Technology
About MOTORMIA
Buy with Confidence
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.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy