Universal 3.5″ ID to 4.0″ OD Exhaust Adapter Reducer, 304 Stainless Steel
Universal 3.5″ ID to 4.0″ OD Exhaust Adapter Reducer, 304 Stainless Steel Exhaust Pipe Connector, 4″ Overall Length. When properly welded or clamped, it provides a secure, leak-resistant connection. (For welding installation, professional service is advised.).