Description
Comparison points and tradeoffs
When comparing Michigan Motorsports LS4 Oil Pan Gasket | Like GM #12643081 | for 5.3L LS4 Front-Wheel Drive Engines | Fits 2005-2009 Impala SS, Monte Carlo SS, GXP, Lacrosse Super with other Oil Pan Gasket Sets options, use this source-backed detail as the primary discriminator: Engineered for 5.3L LS4 FWD Platforms – Designed to fit GM’s unique FWD LS4 block found in 2005–2009 Impala SS, Monte Carlo SS, Grand Prix GXP, and Buick Lacrosse Super.
Use this second fact to evaluate the tradeoff: Easy Direct-Fit Installation – No cutting or custom fitting needed; bolts up cleanly with your factory LS4 oil pan and hardware. A third point to compare across alternatives is: Category: Replacement Parts / Gaskets / Oil / Oil Pan Gasket Sets.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
- Item model number
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MM12643081 - Date First Available
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July 7, 2025 - Manufacturer
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General Motors - ASIN
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B0FGYDK1RL - Country of Origin
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USA - Best Sellers Rank: #1,619,916 in Automotive (See Top 100 in Automotive)
- #933 in Automotive Replacement Oil Pan Gasket Sets
Seal your LS4-powered ride with confidence using the Genuine GM 12643081 Oil Pan Gasket—engineered for exact fitment and superior reliability. Designed specifically for the 5.3L LS4 front-wheel drive engine found in select 2005–2009 GM vehicles, this gasket is the go-to choice for factory-quality sealing during oil pan replacements, engine rebuilds, or leak prevention. Featuring a raised stamped oil deflector tab, this gasket is unique to the LS4’s FWD layout, offering proper internal oil channeling and sealing against high-pressure environments. Built to OEM specifications and backed by GM engineering, it’s an essential component for any serious LS4 build or maintenance job. Whether you’re freshening up a tired Impala SS or replacing a leaking pan on your Monte Carlo SS, this gasket ensures a leak-free install you can trust. No drilling, trimming, or RTV needed—just bolt it on and go.
Source product highlights
About this item
- Genuine OEM GM Part #12643081 – Manufactured by GM to exact factory specs for long-lasting durability, performance, and sealing reliability on 5.3L LS4 engines.
- LS4-Specific Raised Deflector Tab – Features an integrated stamped oil control tab that ensures proper flow and deflection in LS4 front-wheel-drive oiling systems.
- Engineered for 5.3L LS4 FWD Platforms – Designed to fit GM’s unique FWD LS4 block found in 2005–2009 Impala SS, Monte Carlo SS, Grand Prix GXP, and Buick Lacrosse Super.
- Leak-Free Performance in OEM & Performance Builds – Provides an airtight seal during oil pan installation, even under demanding driving conditions or boosted setups.
- Easy Direct-Fit Installation – No cutting or custom fitting needed; bolts up cleanly with your factory LS4 oil pan and hardware.
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