The Flowmaster 842543 40 Delta Flow® muffler is designed for street, strip, and off-road vehicles seeking an aggressive exterior exhaust tone with reduced interior resonance. Its two-chamber design uses race-proven Delta Flow technology to redirect exhaust pulses, improve scavenging, and support responsive engine performance. The offset inlet and outlet configuration makes this universal muffler suitable for a variety of custom exhaust installations, although some adaptation may be required.

Constructed from durable 409S stainless steel, the Flowmaster 842543 is fully MIG welded for long-lasting strength and dependable service in demanding driving conditions. The stainless steel construction provides excellent resistance to corrosion, while the absence of internal packing eliminates the risk of packing material blowing out over time. This design helps maintain consistent sound and performance throughout the life of the muffler.

The 40 Delta Flow® delivers an aggressive exhaust note without the excessive cabin resonance associated with some performance mufflers. It is an excellent choice for enthusiasts upgrading a street vehicle, building a street-and-strip combination, or outfitting an off-road application. As a universal component, professional installation and exhaust system modifications may be necessary for proper fitment. Flowmaster part number 842543 combines durable materials, controlled sound, and proven exhaust-flow technology in a versatile performance muffler.

Features:

• 13" Body Length
• Two-chamber Delta Flow® design supports improved exhaust scavenging and engine performance
• Aggressive exterior exhaust tone with reduced interior resonance compared with standard 40 Series mufflers
• Durable 409S stainless steel construction resists corrosion and withstands demanding use
• Fully MIG welded housing provides dependable strength and long-term durability
• No internal packing helps prevent blowout and preserves consistent sound over time
• Universal muffler suitable for street, strip, and off-road applications
• Offset inlet and outlet configuration may require exhaust system adaptation for installation