Just install a Gibson Swept Side exhaust on my SuperCrew, It was a simple install took about an hour, sounds GREAT!!!. Not load at all, seems to have more torque but only driven about 10 miles so far.

 

Congrats ! I have had a sweptside installed for about 400 miles now and I do love it. Not real loud, but definitely there. I can't wait to put headers on.....1 more month.

 

Hey, did you guys put on a Y-pipe too? I'm looking at the Swept side so any info is appreciated. Thanks.

 

I've had my side swept on a month or so. Great sound. It'll break in a little a get some volume, but not much. When I first cranked it up, couldn't hear much at all. Now afetr a month, it's seasoned and sound great!
I did not do the "Y" pipe. I want to make sure I loose no torque on the low end for towing reasons. If I open it too much, I defeat the reason behind upgrading any part of the exhaust. The Gibby should add some, I don't want to loose that.

 

Wowbam, go ahead and change the y pipe if you're going to have someone weld in your exhaust. Best I can tell from looking at the stock setup is that the driver's side exhaust is seeing turbulence at the factory installed connection (more turbulence than you would see with an aftermarket fitting). This in turn creates back pressure; how much and is it worth it ? The Gibson SS is a 3" in/out and will reduce the turbulence at the Y pipe substantially, but not as much with an aftermarket fitting. If you're going to put on headers, then put the $ into a Y pipe. I did not put one in, but wish I had. I'll be putting Gibson headers on the weekend after Labor Day. After that I'm going to find a shop in town to install a Y pipe. Headers time the exhaust signal from each cylinder so that the pressure wave for any cylinder sees a decreasing pressure zone at the collector (the pressure wave from the preceeding fired cylinder on that side has just gone by the collector). The headers 'scavenge' by seemingly pulling the next pressure wave into/out of the collector. Well designed long tubes do a better job of providing this effect than shorties. If there is turbulence at the Y connection, a back signal can be created that can go all the way back to the collector and interfere with the scavenging effect. If you don't have headers, you already have a standing wave signal in your stock manifold and a Y pipe will do little to correct the situation caused by the stock manifolds. There would probably be a change in sound tone and maybe a slight performance change. Hope this helps.