cidsamuth

Right now, I have the stock manifolds and cats/midpipes. From the H-pipe back, I have the Roush O/R exhaust, which deletes the mufflers in lieu of resonators. I love the sound.

However, I have the mod bug like everyone else, and I wouldn't mind some cheap horsepower. I was thinking of adding an off-road H pipe or X pipe, as they are cheap and easy to install. My tune likely already has the rear O2 sensors turned off anyway (or would be easy to have done).

Here are my concerns:

• The Roush O/R is already pretty loud. How much louder am I going to get by eliminating the cats? Will it be unbearable?
• How much torque am I losing in favor of upper RPM HP? I already have Delete Plugs that have such a tradeoff, and I would hate to lose too much more torque.

Anybody have experience with the Roush O/R and then adding an O/R midpipe?

gman73

I wouldn't go with an o/r midpipe with something like the roush o/r extreme. Too loud, obnoxious and sloppy sounding.

gandyj

I did something similar, I installed the Pypes mid-muffler system which is similar to the Roush extreme except the mufflers are a little larger diameter. I'd already installed shorty headers when I put on the O/R mid-pipe. It sounded really good outside the car but the noise, not drone, inside the car I couldn't take so a few days later I installed hi-flo cats to tame it and now it sounds so much better.

BL00DSH0T

I have the Roush exhaust and have to reinstall an Off/Road H-Pipe this weekend. The Roush has become alittle tame IMO.

IMO it is not sloppy, don't know how an exhaust could be sloppy. But it is louder, especially at cold start-up's. After it warmed up at idle it wasn't that much loud to be obnoxious.

Watch out for the Pypes products. I have had many exhaust on many cars and even built a few turbo back exhaust and their products are the worst I have had. And very bad customer service.
I need to change the studs in the stock manifold to get a good seal and I need to re-bend a pipe and remove un-needed hangers.