Do I need new exhaust piping after installing these headers?

Depends on your current setup. If you're running stock manifolds now, the collector outlet diameter may differ — measure before ordering exhaust work. Headers alone won't require new piping, but it's a good time to upgrade if you want better flow.

Will these fit with my stock air cleaner and other engine bay components?

Headers take up space on the driver side, so clearance is tight in some bays. Check fitment against your intake manifold, power steering pump, and any accessories before committing to installation. Test-fit is your best move.

What prep work should I do before installing these?

Clean the mounting surface on your cylinder head and intake manifold to ensure a tight seal. Apply a good gasket sealer on the header gaskets before bolting them down. Stainless doesn't need paint or coating — it ships ready to bolt.