Eltee what kind of exhaust modifications have you made so far? I recorded what my exhaust sounded like with the 40 Series and when I get around to it I will record the 50 SUV Series to aid people in comparing.
But just a quick synopsis for you:
I have a Intake system, Y-pipe, Hiflo Cat, Removed the Resonator, and have 2.5 pipe throughout. With the 40 Series you could hear my Trac coming from a long distance away... you could here it start up and idle while inside your home... but most importantly to me you could hear it resonate inside the cab at a rather high decible. The interior noise was very intense and I personally liked it for the first couple months but after awhile it wore on me. If I didn't spend hours driving from property to property I think I might have kept it...
However, now that I have the 50 SUV Series I am never looking back! It created a lower and more mellow sound that is very pleasant while idling. Outside the vechile you can hear it almost as well as you could hear the 40 series but its not longer noticeable through the walls of homes. Most importantly the interior noise is much much deluted. Instead of having a painful rattle it has become a smoother constant tone.
Both can be heard when digging in the gas pedal. But the SUV is more pleasant and not nerve racking like the 40 series. Also at cruising speed the SUV is sometimes non existant.
Simplfied...
40 Series: Loud as h*ll and screams going down the road!
50 SUV Series: Upper side of Mellow and furocious when desired.
Hope that helps!
haha Sooooo.......... does anyone wanta buy the ole 40 Series?
