Flowmaster 40 Series Delta Flow Muffler - 2.25" Offset - Inlet / Center Outlet 20-OTL-NB-5XL 3/8" NPT thread-in probe

3/8" NPT thread-in probe

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1999-2007 Ford F-350 Super Duty

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170 in Bore

Flowmaster 40 Series Delta Flow Muffler - 2.25" Offset - Inlet / Center Outlet 20-OTL-NB-5XL 3/8" NPT thread-in probeThis two chamber design incorporates Flowmaster's patented Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable Fully Welded 16 Gauge Aluminized Steel 3 Year Limited Warranty Aggressive To Moderate