Do I need new hardware to install this gasket?

The gasket bolts to factory manifold studs — use your existing hardware if it's in good condition. If studs are damaged or corroded, you'll need replacements; refer to your service manual for stud specifications.

Should I clean the mounting surfaces before installation?

Yes. Remove old gasket material and carbon buildup from both the cylinder head and manifold surfaces with a gasket scraper. A clean, flat surface ensures a proper seal.

What's the return process if this doesn't seal properly?

Test-fit and hand-tighten before final torque. If the gasket leaks after proper installation, contact ModSupply for return options — we stand behind our parts.