Need advise on mac exhaust parts please???
 

i am thinking of ordering the mac pro chamber 2 1/2 in. off road H pipe with mac shorty headers will i gain atleast a 20hp with this setup or am i out of my mind for even thinking that? What do you guys think about MAC'S products? cause if they suck than i will get a better brand?

That's the exact same stuff I've got and I'm pretty happy with it. The Prochamber sounds great. I've heard of a few people having trouble installing MAC stuff, but that's the same across the board...some people hate it, some love it. I had an exhaust shop install mine so I wouldn't know. The 20hp you're looking for kind of depends on your current mods...but that sounds a bit optimistic. If you're totally stock you might get half that. If you've got some other stuff going, maybe 15. If you've got an intake, heads, a cam, etc then 20hp isn't out of the question...but if you've got all that and no exhaust then that'd be pretty odd too.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

i wouldnt spend the xtra $$ but if you have it go for it. you wont be able to notice a difference in performance, you may gain 7 hp if your lucky, go with a regular h pipe

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My slo aod- 3.73s, pullies, flowmasters, h-pipe, bbk cold air, and 13.42 in the 1/4 @ 103 mph

I have the Pro Chamber and love it. Do you still have the stock headers? If so get long tubes! You won't be sorry.

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Too much to list. Best ET on the car so far with stock 2.73 gears - 13.73@102mph

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The only problem I've had with MAC is that the headers are individually flanged, which made it a pain in the a$$ when I had to replace a header gasket. Other than that they make a great product, I have the chrome plated(I forget what the call it) and they still look great after a year.