Do I need to prep the header and cylinder head surfaces before installing this gasket?

Yes. Wipe both surfaces clean with a solvent to remove carbon buildup and old gasket material. A clean, dry surface ensures a proper seal. Don't sand or grind—just remove debris.

What fasteners do I need to bolt the header back down?

Hardware is not included with this gasket. Use the original bolts and washers from your header, or refer to your vehicle's service manual for OEM specifications and torque values.

Can I reuse my old header bolts, or do I need new ones?

If your original bolts are in good condition with no stripped threads or corrosion, they're fine to reuse. If they're damaged, grab a replacement set from your VW dealer or a fastener supplier—header bolts are inexpensive insurance against a leak.