I think that I would probably go with a H-pipe. They are cheaper and I think they sound bettter. But if it's between those two, I would get the ProChamber, just becuase of the different sound it makes.
------------------
87 GT, Cobra R's,GT-40 heads,Crane 2031,1.7's, Edelbrock intake, long tubes,BBK cold air, Mass air,pulleys,Pro 5.0, King Cobra,Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 12.759
Best MPH 106.79
Best 60' 1.695
Visit my site at:
http://www.geocities.com/cobrar93_2000/MyPage.html