Precision Works LS R4 A/C Bracket vs Stock Comparison
By Aftermarket Car Parts -Private Label Mfg | Published: 2026-10-25
Category: Comparisons
Compare the Precision Works LS R4 A/C Bracket to the stock LS bracket. See the key differences in weight, materials, and fitment for LS2, LS3, and LS6 engines.
Quick answer
For LS swaps where weight and compact packaging matter, the Precision Works LS R4 A/C Bracket is the better choice over the stock bracket. It saves weight, uses fewer parts, and is CNC machined from 6061 billet aluminum.
Material and weight differences
The stock LS A/C bracket is typically a heavy cast iron or steel piece. The Precision Works bracket is CNC machined from 6061 grade billet aluminum, making it significantly lighter. The design also uses a thinner bracket plate to further reduce weight.
Installation and part count
The Precision Works bracket uses fewer parts than the stock assembly, which simplifies installation and reduces potential failure points. This is especially helpful in tight engine bays common in LS swaps.
Compatibility and fitment
This bracket is designed for LS R4 A/C compressors and fits LS2, LS3, and LS6 engines. It may not work with other compressor types or older LS variants without modification. Always verify your compressor style before ordering.
Trade-offs at a glance
- Weight savings: Precision Works bracket is much lighter than stock due to billet aluminum and a thinner plate design.
- Part count: Fewer components make installation simpler and reduce potential leak points.
- Fitment flexibility: Precision Works bracket fits LS2, LS3, and LS6 engines with LS R4 compressors. Stock brackets may have broader compatibility but are heavier. Confirm your compressor type is LS R4 before purchasing.
Product facts
- Precision Works LS R4 A/C Bracket LQ LS2 LS3 LS6 Version 2: Version 2 uses 100% billet aluminum with high quality hardware and a thinner bracket plate for lightweight. This means you save significant weight compared to the stock bracket, which helps with overall vehicle balance and engine bay space.
Precision Works LS R4 A/C Bracket LQ LS2 LS3 LS6 Version 2
Which should you choose?
Best for
- LS swap builders who want to save weight and simplify the accessory drive
- Enthusiasts with LS2, LS3, or LS6 engines using an LS R4 compressor
Not for
- Builds using non-R4 compressor types or older LS engine variants without modification
