I have the Lethal Off Road X pipe.
My Roushes are scheduled to arrive tomorrow.
I'm planning on putting them on tomorrow night if they show up, then I'll let you know how they are.
First, a description of my exhaust system:
Lethal Off Road X pipe (no cats), stock over the axle pipes (resonators still present) to Flowmaster Hushpower axle backs.
My car is a convertible GT/CS, and has 3:31 gears. I'm not sure if either of those can affect the presence of the dreaded drone, but I included the info just in case anybody wants to compare.
Love the sound of the HPs, but the drone was too much for me.
Well, I put them on last night, and here are my impressions of the Roush vs. the Hushpower:
My very first thought on startup - disappointment. Then my next thought was, I guess they're OK as long as the drone goes away.
It's hard to describe, but the Roushes sound hollower than the HPs. Maybe thinner is the word to use.
the Roushes are deep sounding, but not as deep as the HPs.
the Roushes pop and snort when you rev it up and let off the gas, but again, hollower or thinner sounding than the HPs.
They are both loud, I think the Roushes are a tad louder, but it's really tough to tell.
There is still a slight drone at times, but the Roushes are 99.99% better than the HPs in regards to drone.
Appearance-wise, both the Roushes and the HPs are attractive on the car. Both are well built and both fit perfectly.
Personally, I like the black body of the HP over the polished stainless body of the Roush. With the HP, all you see is the tailpipes when you look at the back of the car. With the Roushes, you see both the tips and the muffler body.
So, here's a chart as to how I rate the Roush vs. the Hushpowers: Fit, Finish: HP = 10 Roush = 10 Installation: HP = 10 Roush = 10 Looks: HP = 10 Roush = 9 Sound: HP = 10 Roush = 7 Drone(Higher = less drone): HP = 5 Roush = 9 Overall: HP = 45 Roush = 45
So for me, no clear winner, and no clear loser.
Hands down, the Hushpowers sound better at idle, at part throttle and at WOT. They also sound better when you back off of it.
But they drone badly under load at around 2K.
I would probably be very happy with the Roushes if I had gone to them straight from stock. But I didn't
I was going to sell my HPs, but I think I'm going to hang onto them now.
I'll run the Roushes this winter, but if they don't sound better after they wear in, I'll probably put the HPs back on this spring and use some dynamat in the trunk to try to eliminate or at least minimize the drone.