The Dynomax 39311 Ultra Flo Welded Single Cat-Back Exhaust System is engineered for ultimate performance and longevity. Crafted with mandrel-bent stainless steel tubing and a polished stainless steel tip, it delivers a consistent throughput of exhaust gases, enhancing both power and sound. This high-performance system is dyno-proven to flow up to 2,000 SCFM and support up to 2,000 horsepower, ideal for those looking to unlock their vehicle’s true potential.With its unique, continuous roving fiberglass design, the Ultra Flo muffler significantly reduces unwanted interior resonance while maintaining a robust performance tone. Designed for easy bolt-on installation in Chevrolet Silverado and GMC Sierra models from 1999 to 2007, this exhaust kit is 50-state legal, ensuring compliance with emission laws. Backed by a 90-Day Performance and Sound Guarantee and a Limited Lifetime Warranty, it's the perfect choice for both DIY enthusiasts and professional mechanics seeking a reliable and efficient exhaust upgrade.

• Mandrel-bent stainless steel for superior durability
• Up to 2,000 horsepower support for high performance
• 50-state emission legal for regulatory compliance
• Easy bolt-on installation for DIY enthusiasts
• 90-Day Performance and Sound Guarantee
• Durable Ultra Flo muffler with straight-through design
• Lifetime warranty ensures long-term reliability

Bend Type:	Mandrel
Material:	Stainless Steel
System Type:	Cat Back
Single or Dual:	Single
Exit Position:	RH Side
Muffler Type:	Ultra Flo Welded
Inlet Diameter:	3in.
Tip Material:	Polished Stainless Steel
Total Part VIO:	4190798
Weight:	43 lbs.

• 1999-2006 GMC Sierra 1500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 1999-2000 GMC Sierra 2500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2007 Chevrolet Silverado 1500 Classic
• 2007 Chevrolet Silverado 1500 Classic | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~T-409 Stainless Steel~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 1999-2006 Chevrolet Silverado 1500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 1999-2000 Chevrolet Silverado 2500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2001 Chevrolet Silverado 1500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~T-409 Stainless Steel~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2005 Chevrolet Silverado 1500 | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~T-409 Stainless Steel~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2007 Chevrolet Silverado 1500 Classic | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2007 GMC Sierra 1500 Classic | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~T-409 Stainless Steel~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight
• 2007 GMC Sierra 1500 Classic | Note: 3 in. Single System; Single RH(Passenger) Side Exit; Incl. Ultra Flo(TM) Welded Muffler; 3 in. Polished Stainless Steel Tip; 50 State legal Single Exhaust~Ultra Flo Welded System~Under 8600 Gross Vehicle Weight