Does the spoiler use the factory trunk lid mounting holes?

Yes. The assembly is engineered to align with OEM trunk-mounted attachment points. Before installation, verify your trunk lid surface is clean and flat. If you're upgrading from a factory spoiler, the existing holes will line up.

Will this interfere with the trunk lid when it opens?

The three-piece design is positioned to clear the trunk lid on full opening. Standard installation follows factory mounting dimensions, so interference is not an issue. During install, do a full trunk cycle to confirm clearance in your specific setup.

What torque specs should I use for the fasteners?

Refer to your vehicle's service manual for fastener torque values on trunk-mounted accessories. FRP panels are durable but should not be over-torqued. Hand-snug plus a quarter turn is a good starting point; tighten evenly across all mounting points to avoid panel stress.