LS1 Pressure Plate Bolt Kit

The ARP LS1 Pressure Plate Bolt Kit (Part Number 134-2201) is a high-performance chromoly fastener set engineered for GM LS-series engine builds. This six-piece pressure plate bolt kit delivers the material strength and dimensional precision required in competition, street performance, and heavy-duty powertrain applications where clutch clamping force demands precision fastening.

Each bolt features 10mm x 1.50 thread specification with hex head geometry, chromoly construction, and black oxide finish for corrosion resistance. The kit includes washers—a critical detail often overlooked in OEM pressure plate hardware that can compromise load distribution and fastener longevity. Chromoly's superior tensile strength relative to standard steel allows these fasteners to handle the repeated clamping cycles and thermal stress cycles common in high-horsepower LS builds without yielding or fatigue failure.

This bolt set is purpose-built for LS-series engine platforms—a foundational component in transmission assembly where fastener reliability directly impacts drivability and safety. Whether assembling a street engine, a track-focused build, or a rebuilt long-block, using OEM-specification ARP fasteners eliminates the risk of mismatched hardware or undersized fasteners that compromise pressure plate integrity. The black oxide coating provides a mil-spec protective layer, though like all oxide finishes, these bolts benefit from light oil coating in storage to prevent surface corrosion.

ARP's fastener engineering has established the brand's reputation in motorsports and powertrain assembly. This pressure plate bolt kit represents the standard spec for builders who prioritize matched fastener systems and eliminate variables from clutch assembly reliability.