New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US
New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US is a low-mount alternator mounting bracket designed for LS-series truck engines, priced at $47.02. It fits LSX, LS1, LS2 and LS3 blocks with at least two mounting holes, delivering proper belt alignment for high-output alternators.
● In stock
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Key features
- Low-mount design – positions alternator closer to crankshaft for tighter belt routing.
- Fits LSX, LS1, LS2, LS3 blocks with two M10 holes.
- Machined aluminum construction reduces weight.
- Pre-drilled M10-1.5 mm holes included.
- Bolt-on installation uses existing hardware.
- Supports 145 A and 160 A truck alternators.
- Anodized finish resists corrosion.
Pros
- +Matches OEM bolt pattern, no extra drilling needed.
- +Lightweight machined aluminum saves weight.
- +Anodized finish protects against rust.
- +Improves belt tension for better charging.
Cons
- −Requires separate rear brace, idler pulley, and belt.
- −Blocks with only one M10 hole need drilling and tapping.
About New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US
What is New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US?
This low-mount alternator bracket is engineered specifically for General Motors LS-series truck-style engines (LSX, LS1, LS2, LS3). It replaces the factory-mounted high-position bracket, allowing a truck-rated alternator to sit lower in the engine bay, which shortens the drive belt path and improves tension consistency. The part is sold without the rear alternator brace, idler pulley, or belt, so it is intended for a complete build that includes those components.
Key features
- Low-mount design — positions the alternator closer to the crankshaft for tighter belt routing.
- LS-series compatibility — fits LSX, LS1, LS2 and LS3 blocks that have at least two M10 mounting holes.
- Machined aluminum construction — provides strength while keeping weight low.
- Pre-drilled holes — includes two M10-1.5 mm holes; a third hole can be added if the block only has one.
- Easy bolt-on installation — uses the same bolts as the OEM bracket, no custom hardware required.
- Optimized for high-output alternators — works with 145 A or 160 A truck alternators when paired with a longer belt.
- Corrosion-resistant finish — anodized coating protects against road-salt and moisture.
Who is New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US for?
The bracket is aimed at performance-oriented DIYers, race shop builders, and shop-floor technicians who are upgrading a street-legal LS engine to a truck-style alternator for increased charging capacity. It is also useful for owners of classic Camaro or Corvette builds that have been swapped with LS powerplants and need a reliable, low-profile charging solution.
How does New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US compare?
Compared with a standard OEM high-mount bracket, this part reduces belt length by roughly 2-3 inches, which translates to less belt stretch and more consistent voltage under load. Unlike generic aftermarket brackets that may require extensive drilling, this unit matches the factory bolt pattern, saving installation time. It also offers a higher-grade aluminum alloy than many budget-oriented options, delivering better durability without a significant price premium. The bracket’s anodized finish also helps it resist corrosion in humid climates, making it a solid choice for both street and track applications.
Best use cases
- →Upgrade a street LS1 Camaro to a 160 A truck alternator.
- →Install on an LS2 Corvette swap for higher charging capacity.
- →Fit an LS3 truck engine in a custom hot-rod with limited belt space.
- →Replace a failing OEM bracket on a 1999 LSX performance build.
Is New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US right for you?
Buy this bracket if you are comfortable with basic engine work and have the required tools for bolt-on installation. It is ideal for LS-series owners who want a truck-rated alternator and already have or plan to purchase the rear brace, idler pulley, and appropriate belt. For those seeking a complete kit, consider a full alternator package that includes the brace and belt to avoid extra sourcing.
How it compares: Compared with generic low-mount brackets, this part matches the OEM bolt pattern, eliminating extra drilling, and uses a higher-grade aluminum alloy for better durability. It sits between budget-oriented steel brackets and premium-priced custom-fabricated solutions, offering a solid balance of fit, strength, and price.
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What does the low-mount bracket replace?
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The low-mount bracket replaces the factory-mounted high-position alternator bracket on LS-series truck engines. By moving the alternator lower, it shortens the drive belt path, improves tension, and allows the use of higher-output truck alternators without modifying the engine block any.
Does this bracket require any drilling?
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If your LS block already has two M10-1.5 mm mounting holes, no additional drilling is needed. For blocks that only provide a single M10 hole, you will need to drill and tap a second hole to the same specification before installing the bracket.
How do I know if my LS block has the required mounting holes?
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Inspect the front of the engine where the alternator sits; the factory bracket leaves two threaded M10 holes spaced about 2 inches apart. A quick visual check or measuring with a caliper will confirm whether both holes are present and correctly sized.
Is the bracket compatible with a 145 A truck alternator?
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Yes, the bracket is designed to accommodate standard 145 A truck-rated alternators. When paired with a 145 A unit, you will need a belt that is approximately three-quarters of an inch longer than the stock belt to maintain proper tension and reliable charging.
Can I use this bracket with a standard 90 A street alternator?
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The bracket will physically mount a 90 A street alternator, but the low-mount design is intended for truck-rated units that need the extra belt length. Using a standard street alternator may result in insufficient belt tension and reduced charging performance.
How much does New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US cost?
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New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US is $47.02 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US in stock at Lab Work Auto?
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Yes, New For LS Truck Alternator Only Bracket Low Mount LSX LS1 LS2 LS3 US is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-011428