B5 S4 Straight pipe AMAZING SOUND!!!!

this is my 2001 S4, all stock exept for Exhaust

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Audi S4 B5 downpipes 3" in straight pipe 4"
Downpipes 3" in 4" Exhaust system





Mercedes ML55 AMG straight pipe
my 2001 Mercedes Benz ML55 AMG with no muffler





APR B5 S4 RSC Exhaust System
Reflective Sound Cancellation allows for maximum Exhaust gas flow while completely eliminating in cabin sound resonance (drone). RSC™ incorporates innovative technologies developed in conjunction with NASA. With limited use of packing materials and no baffles, RSC™ allows for a completely straight and free flowing Exhaust path through the RSC™ mufflers. Reflective Cancellation bounces the undesirable sound waves into each other to attenuate the wave and completely eliminate the low frequency tones that create drone. Each RSC™ muffler is tuned to eliminate specific, undesirable sound frequencies allowing only the engine's desirable Exhaust notes to be heard and improving performance. The B5 S4 in the video has a full APR RSC Exhaust System with an APR Stage III K04 turbocharger System.





Audi S4 Timing Belt DIY
2000, 2001, 2002 B5 Audi S4 Timing Belt DIY. Put a lot of hours into this. There are different and faster ways to change a timing belt, this is the way I do it.




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