Not true;I would say there is a small gain,maybe 2 - 3 H.P.across the range.

 

Nah, no placebo effect... ive had it on once before, took it off and put the stock cat back on. I just recently put it back on not expecting it to feel a bit quicker but it is slightly noticable difference.

 

A before and after dyno with the test pipe would be nice. You will see a considerable increase in hp since your blown. I would get the A/F checked just in case. Since I've removed my cat, my ass is always covered in black soot .