Mac vs Long Tubes
the install is a pain in the ***, so why short yourself the 10 or 15 more hp you would gain with the longtubes over the shortie style header? save up and get the longtubes definetely. my buddy has a 99z28 and he gained almost 30rwhp with just longtubes and an ory pipe.
As far as power, I have a comparison that isn't necessarily direct: my car put down 334 RWHP with MACs, catd' Y-pipe, and canned tune; with my second set of QTPs (HVMCs) my car put down 366 RWHP with a catd' Y-pipe and dyno' tune. Same dyno, and it was hotter on the day with the QTPs. It's not direct, but it'll give you an idea.
IMHO, go with LTs. If you're state sucks like mine, both are illegal, so why not make the most of it? If your concern is cost, there are nice Hooker stainless LTs out there among many others.
Good luck.
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IMHO, if you don't have headers, ALWAYS get LT's. If you have macs but don't plan on heavy mods later then it's not worth the switch.
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2000t/a with lots of mods
Sorry if i hi-jacked
I made 400RWHP through macs without really trying, oh wait, it was ONLY 399.02RWHP (for the naysayers) and that was on STOCK heads. The dyno thread is up in the dyno section if you wanna search for it. My mod list is also on there.
EDIT: I think the most common problem is people confuse MAC mids with shorties and they just assume they are not good since there is so much misinformation floating around.


