LS Transmission Bolts Set Kit Tested: Surprising Compatibility for 4L60e, T56, and More We were surprised by how versatile this LS Engine Transmission Bell Housing Bolts Set Kit turned out to be. Initially, we expected it to fit just the 4L60e, but its compatibility with the 4L80e, T56, and even a range of LS engines like the LS1, LS3, and L87 was a pleasant discovery. The set includes all necessary bolts for secure attachment, and we appreciated the clarity of the included fitment guide. During our testing, we installed it on both a stock setup and a modified build, and it held up flawlessly under stress. The bolts' hardened steel construction ensured durability, while the precise threading simplified the process. What stood out was its seamless integration across different models without requiring adjustments-something we didn't anticipate. For mechanics and hobbyists alike, this kit offers a reliable, cost-effective solution, proving that quality hardware can adapt to a broad spectrum of needs. A great addition to any LS engine rebuild or retrofit project.