well, I've kept it a 'secret' for long enough that I was going to swap out my stock mufflers for some Borlas. I ordered them last week and got them installed today. I'm not too happy with the sound however. When I installed Borla mufflers on the Riviera they were very deep sounding. The borla'* don't sound as impressive on the 3.5 though. at idle they're as quiet as stock and there'* a slight drone at around 70 MPH. (highway cruising speed which I do 4 days a week. >:( ) When you gun it it'* real loud up until 4,000 RPM then the exhaust falls almost silent again. I don't know if it'* the engine displacement that makes it sound like this, or what.. not sure really. I have heard that mufflers have to "break in" and after a few thousand miles will start to sound better. Hopefully that'll be the case here? I was expecting a deeper sound. Luckily these mufflers aren't too loud though.
They're the Borla PRO XS mufflers that retail for $150. I got them on Ebay for $87 each though. The installation ran $40. (they were welded on.) These Borla'* weigh about half as much as the stock mufflers and they're basically the same size!
Stock mufflers mounted
New Borla Mufflers
New Borla'*.. they're a straigh-through design. You can see from one end straight through to the other. The stock mufflers have several 180* bends in them
Borla PRO XS mufflers mounted
In the first clip, I have the windows down and start off at 1/8 throttle. I then gun it to go WOT. In the second clip I'm only going half throttle toward the end. In the last clip of this video, I went full throttle at around 20 MPH. the windows were up. The rattling sound you hear is from the stock mufflers in my trunk..
This is a video of the exhaust from outside of the car