Mac Power Chamber = 23hp?
 

Mac claims it's power chamber (similar to an H/X-pipe will give me 23hp at the wheel. Is this for real? Also, (and knowone seems to know for sure) what type of sound change can i expect?

I'm ready for a next mod - this looks good so far. What i've got know is Mac cold air on a 97GT 5-speed.

Good question,

I'm looking at 1 3/4 MAC long tubes, 3" Cat Backs, and either a MAC Power Chamber or a Dr Gas X-chamber...

Which is better, a Power Chamber or a Dr. Gas X-chamber???

I read more than one article that a Dr. Gas set-up is worth about .10 over a standard H pipe set-up...