What HP gains have you noticed over stock? Anyone with Dyno results? What should of an increase should I see with the new pipe cat, and possible b-pipe, using a Stillen muffler?

 

I noticed a solid 15hp, but I have no dynos to prove it....yet.

 

I have a Stillen pipe and noticed a loss of low end power when used with the Greddy Cat-back and Random Tech Cat. Although the car doesn't hit hard off the line it does pull much harder and seemed to get to higher speeds quicker. I did not dyno yet, sorry. I did my entire exhaust at once, so I am not sure which components gave the power and which took away from low end.

Erik

 

I firmly think that your low-end woes are coming from your intake. If the Greddy uses 2.5" piping you should not lose any low end. It hasn't been proven. BUT it has been proven with the pop-chargers.

My advice to you is to get a Cold air intake, to feed your car cool air and get rid of that lag.

 

With just a Y pipe, my 1/4 mile times went from 14.87 @ 92.6mph with a 2.21 60' to 14.46 @ 96.47 mph with a 2.18 60'. Its a gain I could feel as well as see on papar. The thing really rips above 3500 rpm now.

 

Damn that's a really fast quarter mile for a 96. Wish mine was that fast.

I just got a Cattman Y and an RT cat and the difference is night and day (before I just had a JWT Popcharger) -although during the install I found out that I had a leak in my stock Y Pipe so it's possible that Im realizing gains I should have had before.

In any event, Im very happy with the purchase.