Mac Headers
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From: Lincoln, Ne
Mac Headers Well i know i have had some posts recently planning on purchasing the Jet Hot Lt's. But a deal came up locally for a set of mac's w/ ory new in box for around $400. This seems like a deal i cannot pass up, what do you guys think?
Seems like a decent deal. I got mine new for $475 shipped. Ground clearance won't be an issue w/macs if you plan on lowering......but you'll give up a few hp to long tubes. I like them a lot and installation was pretty easy.
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From: Lincoln, Ne
Ok this might be just a rumor but i could have sworn LS1speed.com had a note under the mac headers when they used to sell them. The note said something about on a 2000 model year LS1 that you need to purchase a few extra pieces/tubes or something. Not really sure what they were for thats why im asking. And the minimal HP lost to longtubes seems like its worth it since im paying about half of what i would pay for LT's and a ORY.
I think they reffered to AIR block off plates... You'll be fine, as far as I'm concerned, all MAC's are identical with an exception of those AIR tubes, which can be blocked off easily.
depends which headers you are getting, originally macs just fit 98-99s (the most common ones out there), you can bend the 2000 egr tube to fit but the AIR tubes are a real pain to get to work but its doable. Mac also sells 2001-2002 headers that dont have the EGR fitting so make sure the headers have the EGR fitting if you want to keep it.
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From: Lincoln, Ne
Is the EGR fitting the piece that comes off of the passenger side manifold? What has to be changed with the AIR tubes? Is there anyway i can get a picture of all of this. Sorry to be such a PITA.
Last edited by C.J.; Mar 18, 2005 at 01:21 PM.
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Launching!
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From: Colorado Springs
If you're planning on additional mods in the future, I would avoid the Macs and go with the LTs. As the mods increase (cam, heads, etc...), so does the HP difference between the LTs and the mids... Hell, on a H/C car, there's virtually no advantage to the Macs over the stock logs.
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From: Lincoln, Ne
There are quite a few guys on here. That are H/C and are in the 11's and they are using the Macs. I hear from quite a few of those guys that the Macs make power similar to LT's.
I have seen a guy putting 600 rwhp with MACs (he had a single turbo) Sure, LT will give you a little bit more, but let's not get crazy here. Not like MACs will rob 50% of your power as some say.
If you can find a nice deal on MACs (ie. I got them slightly used with custom coating with ORY for $375) then by all means GET THEM. Otherwise spending $800+ for pipes is just not worth it.
If you can find a nice deal on MACs (ie. I got them slightly used with custom coating with ORY for $375) then by all means GET THEM. Otherwise spending $800+ for pipes is just not worth it.
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From: Lincoln, Ne
Ya i can spend around 400 for new in box mac headers and ory. If i dont buy them i will just end up saving up and spending over 1k for Kooks and ORY. So im pretty much just looking for the pluses of Macs. I know there will be a few less HP than with LT's. But that doesnt really matter. I will never do anything crazy, just bolt ons. As long as im in the 12's ill be happy.
Here are some pics from the drivers side and the passenger side.What I did the passenger side is kind of a cobble. It kinda helps out though for the check valves that are in the egr from burning up or the famous clicking sound. I also cut the original on the passenger side then rewelded it, shorter. Make sure you do the small hole mod on the egr fittings. These are Mac headers on my 2000z28 camaro.
Originally Posted by Clipper
If you're planning on additional mods in the future, I would avoid the Macs and go with the LTs. As the mods increase (cam, heads, etc...), so does the HP difference between the LTs and the mids... Hell, on a H/C car, there's virtually no advantage to the Macs over the stock logs.
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From: Lincoln, Ne
So what is with the rubber hose on the passenger's side? Why couldn't you just use the factory ****? Or does it not fit? I really dont know if i want to deal with all of this fabrication stuff. Is there any sort of adapter kit that i could buy?
Mac headers are only made for 98-99 ls1s or 01-02 using block off plates for egr connectors. So to get it to fit you either have to have the 98-99 egr tubes or the mac adapters I believe. Ive seen the adapters and they are like 150 bucks or something like that.
You could find someone who has took off 98-99 egr tubes and put them on your car. I just paid somone to delete my egr,air, and o2's since the only other way around that would be o2 sims, tubes or adaptors for the egr. Plus you can remove all the junk and save some weight off the front end. The sims will be needed if you run an off road pipe anyway, so that is working on the price of a computer tune anyway.
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From: I-L-L-I-N-O-I-S
Originally Posted by Clipper
If you're planning on additional mods in the future, I would avoid the Macs and go with the LTs. As the mods increase (cam, heads, etc...), so does the HP difference between the LTs and the mids... Hell, on a H/C car, there's virtually no advantage to the Macs over the stock logs.
I seriously hope that's not what you're talking about...
Mike