2003 GMC Sierra 3500 Mufflers

Product Features:

• EASY TO INSTALL – Direct-fit bolt-on replacement solution with OE-style hangers, brackets and pipe routings for easy installation and doesn’t require specialized fabrication and welding
• RESISTS CORROSION – Internal drainage system helps reduce moisture collection
• BUILT TO LAST – Internal partitions and mechanically joined tubes allow expansion and contraction during temperature changes to minimize distortion while spun-locked heads and OE-style spot welds provide stability and longer service life
• PREMIUM ACOUSTIC CONTROL – OE-style louvered tubes lower noise levels while OE-style domed heads help reduce radiated noise for premium factory-style sound quality compared to straight perforated tubes
• DESIGN VALIDATED – Acoustic and flow tested for quality OE-style sound you can count on
• BUY WITH CONFIDENCE – Comes with Walker’s limited warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.

Developed from our Top Ten race muffler lineup for use on the street/strip, the Super 40® features Flowmaster’s Delta Flow® technology. It’s larger case profile provides the best of both worlds of performance and sound, especially on forced induction and high horsepower vehicles. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow® technology. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

Product Features:

• Durable fully welded 409SS stainless steel
• Race proven Delta Flow technology
• Dyno Tuned For Maximum Performance
• Deep Aggressive Sound Exhaust Note
• Excellent performance on high horsepower vehicles

Flowmaster’s Flow FX series mufflers deliver a moderate performance tone for the enthusiast looking for an exhaust note that is different from the “chambered” muffler sound. With a dual 3.00-inch inlet and outlet size, this muffler is a great choice for large displacement gas engines. The interior features a large 3.00-inch “straight-through” X-pipe style stainless steel perforated core, surrounded with high-temperature sound absorption materials delivering a deep traditional mellow tone. The internal flow design is reversible, so the muffler can be installed in either direction to best suit the vehicle application. Features include fully MIG-welded “bright” 409 stainless steel construction with the Flow FX logo embossed on both sides of the case. The Flow FX line of mufflers are perfect for the person looking for a show quality performance muffler at an economical price point and in a compact sized case.

Product Features:

• Durable fully welded bright 409S stainless steel for good looks and long life
• High temperature interior sound absorption material offers great sound control
• High flow straight-through design for great performance
• X-pipe style muffler core for improved sound control and exhaust gas scavenging
• Moderate exterior performance tone
• Mild to moderate interior tone
• Flowmaster quality