3 bolt flanges are commonly found on header collectors and mid-pipe joints, offering a slightly more secure connection than a 2 bolt flange for sections that see more heat and vibration. Bolt spacing can vary between brands and applications, so it's important to match the flange to your existing pipe or header rather than assuming a universal fit. See our full exhaust flanges range if your application needs a different pattern.

Where are 3 bolt flanges commonly used?

Often found on header collectors and mid-pipe joints, where a slightly larger and more secure connection than a 2 bolt flange is needed.

Do all 3 bolt flanges use the same spacing?

No, bolt spacing can vary between brands and applications, so match the flange to your existing pipe or header exactly rather than assuming a universal fit.

What gasket suits a 3 bolt flange?

A gasket cut specifically for the 3 bolt pattern and matching pipe diameter, to ensure a proper seal once the joint is torqued up.

Can I upgrade from a 2 bolt to a 3 bolt flange?

Yes, if you're fabricating a new joint, but you'll need to weld on a new flange rather than simply swap the gasket to change bolt patterns.