Mac headers on my 2000 Z?
Thread Starter
Joined: Mar 2002
Posts: 5,778
Likes: 4
From: SW Chicago, IL
Mac headers on my 2000 Z? I did a search and keep reading how good these headers are, and I know a guy 30mins away from me selling a brand new set of Mac mid length headers with the high flow cats & Y pipe for 98' and up LS1's and he ported out the slag around the flanges. He said I can pick them up for $500.
- I was wondering if this is a good deal?
- Will I see a good gain with my mods?
- Will it sound good with my loudmouth? (I love how it sounds right now)
I hope you guys can help (I ususally get good help here <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> ), and I could possibly be buying in a week if I'm convinced that they will do good. FYI: My 2000 Z28 will be ridding on eibach sportline springs, waiting til spring to put them on.
- I was wondering if this is a good deal?
- Will I see a good gain with my mods?
- Will it sound good with my loudmouth? (I love how it sounds right now)
I hope you guys can help (I ususally get good help here <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> ), and I could possibly be buying in a week if I'm convinced that they will do good. FYI: My 2000 Z28 will be ridding on eibach sportline springs, waiting til spring to put them on.
Re: Mac headers on my 2000 Z? id sure try to go for LT's. Midlength is ok though.
The MAC cats are horrible. If you get the headers, get better cats.
the loudmouth doesnt have a muffler..so its gonna be raspy, good cats will help.
if your not worried about smog, get longtubes, if you are..sounds ok to me, but really your just buying $500 mid-length headers. I wouldn't buy the rest for 50 bucks
The MAC cats are horrible. If you get the headers, get better cats.
the loudmouth doesnt have a muffler..so its gonna be raspy, good cats will help.
if your not worried about smog, get longtubes, if you are..sounds ok to me, but really your just buying $500 mid-length headers. I wouldn't buy the rest for 50 bucks
TECH Fanatic
Joined: Dec 2002
Posts: 1,084
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From: Bring it........ b*tch
Re: Mac headers on my 2000 Z? "MAC cats are horrible"
I hear everyone yak about this all the time. (BTW I'm the guy who's selling the headers he's talking about.) And NO I'm not selling them because of the cats. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
I'd REALLY like someone to give me some definitive proof these are "so horrible." I've seen ONE and only ONE flow test for these quite some time ago. Is one flow test by an anonymous source the end all be all? I wouldn't think so.
Joe Prince said they didn't "suck."
I think at this point all of you are going completely by word of mouth. I want someone to show me how horrible they REALLY are.
I hear everyone yak about this all the time. (BTW I'm the guy who's selling the headers he's talking about.) And NO I'm not selling them because of the cats. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
I'd REALLY like someone to give me some definitive proof these are "so horrible." I've seen ONE and only ONE flow test for these quite some time ago. Is one flow test by an anonymous source the end all be all? I wouldn't think so.
Joe Prince said they didn't "suck."
I think at this point all of you are going completely by word of mouth. I want someone to show me how horrible they REALLY are.
Staging Lane
Joined: Dec 2002
Posts: 71
Likes: 0
From: Lindenhurst, Long Island
Re: Mac headers on my 2000 Z? I love my Mac's, no problems whatsoever. As far as the cats, this has been argued on LS1.com, the bottom line is that their was no proof they suck. People like to say they suck but have no proof, I know because I have asked these people to show me proof and they couldn't. Have I had a problem with Mac cats,NO. Would I buy them with cats again, YES. Just my opinion.
Jay
Jay
TECH Fanatic
Joined: Dec 2002
Posts: 1,084
Likes: 0
From: Bring it........ b*tch
Re: Mac headers on my 2000 Z? F***IN' A!
THANK YOU N.Y. LS1.
Finally someone on here that actually thinks for himself and HAS MAC cats on his car.
See, that's what I'm saying - nobody has any specific examples of how "MAC cats" lost them 20 horsepower or whatever...... If you do, I want to see your before & after dyno #'s.
I don't know how the hell everyone jumped on this MAC sucks bandwagon with no #'s other than some ancient and IMO questionable flow test. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
THANK YOU N.Y. LS1.
Finally someone on here that actually thinks for himself and HAS MAC cats on his car.
See, that's what I'm saying - nobody has any specific examples of how "MAC cats" lost them 20 horsepower or whatever...... If you do, I want to see your before & after dyno #'s.
I don't know how the hell everyone jumped on this MAC sucks bandwagon with no #'s other than some ancient and IMO questionable flow test. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Launching!
Joined: Nov 2001
Posts: 201
Likes: 0
From: Almonte, Ont. Canada
Re: Mac headers on my 2000 Z? I looked into this a while ago as well and actually contacted MAC for some flow data. They referred me a page on their website that contains flowdata for LS1 cats. The url to that page is: http://www.macperformance.com/macsto...rocatflow.asp.
For comparison data, look at http://www.installuniversity.com/ in the tech article section they have flow data on stock, TTS, FLP and Carsound cats.
From what I can see, MACs can flow as good as any of the others if you get good ones, but there is tremendous variability in the MAC flowrate. The data on their website shows the flow rates range from about 210 to 460 cfm for a given static pressure.
This may be why some people like them and some don't.
For comparison data, look at http://www.installuniversity.com/ in the tech article section they have flow data on stock, TTS, FLP and Carsound cats.
From what I can see, MACs can flow as good as any of the others if you get good ones, but there is tremendous variability in the MAC flowrate. The data on their website shows the flow rates range from about 210 to 460 cfm for a given static pressure.
This may be why some people like them and some don't.
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TECH Fanatic
Joined: Dec 2002
Posts: 1,084
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From: Bring it........ b*tch
Re: Mac headers on my 2000 Z? BeaSSt,
Great post. Thanks for the info.
I wonder if the issues with some of the MACS were based on early sets they sold, perhaps they had some quality control issues intially.
I would find it hard to believe if they were so bad they would continue to manufacture them as "hi-flow" cats if they couldn't even perform as well as stock (what MANY people say/think.)
I think there's proof right there that they can flow as well as Carsounds, Random Tech etc. with REAL numbers not just uninformed opinions.
Great post. Thanks for the info.
I wonder if the issues with some of the MACS were based on early sets they sold, perhaps they had some quality control issues intially.
I would find it hard to believe if they were so bad they would continue to manufacture them as "hi-flow" cats if they couldn't even perform as well as stock (what MANY people say/think.)
I think there's proof right there that they can flow as well as Carsounds, Random Tech etc. with REAL numbers not just uninformed opinions.
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Re: Mac headers on my 2000 Z? Those headers used to be on my car. Al bought them from me few months ago. The cats are made by random tech. I picked up close to 40rwhp with the headers, borla and a air lid on a 2000ss.
