Will this diffuser scrape on steep driveway approaches?

The AM Design diffuser sits close to the factory bumper line. Verify your vehicle's current rear bumper clearance and driveway approach angles before installation. If you regularly experience scrape with OEM parts, this diffuser will behave similarly — ground clearance depends on your setup, not the diffuser itself.

Does this require drilling or is it a bolt-on install?

This diffuser uses factory mounting points on the IS rear bumper. Verify your vehicle's OEM bumper attachment method — most IS models use existing bolt locations. Reference your service manual or rear bumper removal guide to confirm fastener locations and requirements before beginning.

What surface prep should I do before painting?

Sand and prep the raw FRP surface using appropriate grit before applying your chosen finish. The diffuser arrives ready to accept primer and paint — the prep quality directly affects adhesion and final appearance, so take time with the sanding stage.