Do these bolt to the factory exhaust manifold mounting points?

Yes, these mount at factory mounting points — no drilling or chassis modification needed. Test-fit before final tightening to confirm clearance with your specific engine bay setup.

Will I need to weld these to my downpipe, or do they bolt on?

Bolting method not specified — confirm your downpipe flange compatibility and fastener type before ordering. Headers and downpipes don't always align perfectly between manufacturers.

Can I run these headers with a stock catalytic converter?

Headers and cat sizing depend on your exhaust system's overall design. Verify your converter outlet diameter matches the header collector size to avoid flow mismatch or fitment issues.