Will I need to replace the header bolts when I install this?

Not necessarily — if your existing bolts are clean and undamaged, they'll work. If they're corroded or stripped, grab a new set before you start; it's the right time to refresh them.

Do I need to clean the sealing surfaces before installing this gasket?

Yes. Scrape away any old gasket material and carbon buildup from both the header and manifold surfaces with a gasket scraper. Wipe clean with a rag — a smooth, dry surface ensures the seal.

What torque spec should I use when bolting this down?

Refer to your vehicle's service manual for the exact torque value — it matters. Tighten in a cross pattern to ensure even clamping pressure across the gasket.