Right now I actually don't have a strong opinion as to which one is better than the other mainly because I have no dyno numbers to accurately compare the performance difference. Right now if I had to buy one set or the other I'd probably buy the one I could get the best deal on

As for the slip fit... that's not really an issue IMO. I've seen no problems with them on my bud's car. Here are some pics...

http://www.brentfranker.com/gallery/album107?page=4

 

So all he did was attach them with those clamps?.... 3" collector to 3" piping with just those clamps holding them together with no problems? sounds great...sounds like what im gonnna do...

btw i havent got the vinyls i got form u on the car yet.....im waiting for the spring...but once i do i will def send some pics ur way....

 

No... it is an actual slip fit. They overlay by an inch or two and then the clamp goes over this area. When you use an impact gun to tighten the bolts these seal up very good

http://www.brentfranker.com/gallery/...500_IMG?full=1

Sounds good on the pics. Thanks!

 

ooo so the collectors a lil larger then 3"....so the piping can slip right in...then u clamp it down....sorry its just hard getting a visual of it.

 

other way around. The pipe is slightly larger than the collector to go over the collector and clamp down.

 

so the collectors rn't exactly 3"?

 

the collector is 3", but the pipe that goes over it is slightly larger. Its done with a pipe expander so one pipe can be slipped over the other.

 

The collector in the pacesetters would be 3" OD (outer diameter, measured from outside edge of pipe) and a universal X-pipe will have a 3" ID (inner diameter, measured from inside edges of pipe), allowing them to slip together.

 

much better explanation than mine

 

i hope ur right! if not i will bring my duals to my friend who will widen then on that machine he has at his shop...