[bumblebee99]

When it was time to replace my exhaust on my 99 v6 I decided to go dual. It took my some time because when I did my exhaust about 2 years ago it was hard to find a true dual exhaust set up for the v6. I didn't want a "y" set up since I do plan on putting a supercharger on her, planning ahead saves time, money and headaches. I settled on a package put out by pypes performance, its part number is SFM56. I have been very happy with it, there is a noticable increase in power. In coperation with a CAI, the rasspiness is hardly noticible.

[smithstang]

i have magnaflow 2.5in. System, Dual Muffler, 4 in. Tips, Dual Split Rear Exit, part 16605, and i LOVE it. minus one little thing. after i drive it for a while (about 2+ hours) the sound from the exhaust starts to fade quite a bit. but once i let it cool down all the way or add gas to the tank, it comes back to life, any ideas what could be the causative factor in this dilemma?

[Redlyr]

After extended periods of driving, the exhaust system gets very hot. As metal heats up it expands and get less dense. Less density = less resonance = less sound.