2003-2009 Toyota 4Runner Mufflers

Sound character adjusts through 2003-2009 Toyota 4Runner Mufflers changing exhaust notes without complete system replacement. Chambered designs produce deep tones, while straight-through options flow better supporting more power. Resonator positioning affects drone frequency-some locations create unbearable highway resonance that different placements avoid.

 

Stainless construction resists corrosion better than aluminized steel rusting through in salt climates. Single versus dual outlet designs affect both sound and appearance, with dual outlets creating sportier aesthetics despite minimal performance differences when replacing factory single-outlet systems.

 

A new muffler can tweak your sound, but if you’re chasing a bigger change in tone and performance, it’s worth looking at the full exhaust lineup. You can see every option—headers, tips, pipes, and all the supporting hardware—by browsing 2003-2009 Toyota 4Runner Exhaust. For a swap that really reshapes how your 4Runner sounds and breathes, 2003-2009 Toyota 4Runner Cat-Back Exhaust replaces everything from the catalytic converter back. And if you want to improve flow even earlier in the system, 2003-2009 Toyota 4Runner Mid-Pipes help the engine exhale more efficiently right from the start.