Do I need new bolts or fasteners to install this?

Gaskets alone don't require new hardware — your existing header bolts work fine. If bolts are corroded or stripped, source them separately; standard automotive fastener suppliers carry FA-S exhaust bolt kits.

Should I prep or clean the mounting surfaces before installation?

Yes. Scrape off any old gasket material and carbon buildup from both the manifold and cylinder head with a gasket scraper or soft wire brush. A clean surface ensures a proper seal and prevents future leaks.

What do I do if I notice exhaust noise or smell after installing the gasket?

Tighten all header bolts in a crisscross pattern to your vehicle's factory torque spec — consult your service manual for exact values. Uneven bolt tension is the most common cause of post-install leaks. Retorque after 50 miles of driving.