AVONDALE, Ariz. — The cars sounded better than they felt during NASCAR's two-day test session at Phoenix Raceway. NASCAR invited six drivers to participate in the test to try to improve the ...

SMO — Preliminary results of a test measuring the sound reduction capacity of a muffler on a small airplane are in, and it looks like residents near Santa Monica Airport may have gotten an early ...

We've all heard the talk. It seems to run the gamut from, "Dude--headers are worth 100 hp," to the naysayers who snivel "Headers? They aren't worth the trouble." The truth is actually somewhere in the ...

SMO — Santa Monica city officials, Justice Aviation and residents are collaborating on a possible solution to one of Santa Monica Airport's most vexing problems — the constant drone of airplanes over ...

SANFORD, Fla. — The noise at the SunRail maintenance yard in Sanford could be reduced this weekend due to a plan officials are trying out. Neighbors said since last year, there has been a constant ...

Street exhaust systems have always been somewhat ignored by performance enthusiasts. Exhaust pipes and mufflers are usually regarded as necessary evils when in search of ultimate street performance.