MAC midlengths, i have a few questions
Thread Starter
Joined: Mar 2003
Posts: 8,319
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From: North Carolina
MAC midlengths, i have a few questions ok for one i dont wanna spend all that money on the full lengths. i just wanna know about how much power i can gain from this and how much less it is than full lengths. how is the coating on these headers? is it ceramic? and will it get cruddy looking? how is the ground clearance? how about the sound? and fit? and is there any way to order them without emission provisions on them? thanks guys
Teching In
Joined: Oct 2003
Posts: 34
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From: Bear Creek, NC
Pacesetter L/T's with O/R Y are about the same price as the Mac's with the O/R Y. I'm planning on going ahead and getting the Pacesetter's. Heard lots of good reviews about them. Haven't heard much about the Mac's.
You get about 25 hp from long tubes; that's 20 hp more than Macs. Going through a header install for 5 hp wouldn't be worth it to me, especially knowing how much better I could have done with long tubes.
Originally Posted by untchabl
Pacesetter L/T's with O/R Y are about the same price as the Mac's with the O/R Y. I'm planning on going ahead and getting the Pacesetter's. Heard lots of good reviews about them. Haven't heard much about the Mac's.
macs arent worth it, go as SSaction (i think). his macs killed him on the dyno with his x1 cam and bolt ons.
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Verdad Gallardo Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
nvm i found them 464.98 coated and with ypipe. that was from texas speed. is that coating ceramic? and how about the ground clearance wiht these headers?
Originally Posted by Cal
You get about 25 hp from long tubes; that's 20 hp more than Macs. Going through a header install for 5 hp wouldn't be worth it to me, especially knowing how much better I could have done with long tubes.
I bought my Macs before Hookers or Jet Hots were available. They are still on my car. They may give up a bit of low and mid range power to long tubes, but give up very little, if any up top. Some have made more peak power with Macs then with long tubes. I have a custom y-pipe with a Flowmaster collector with mine. ! ball connectors, 3" y-pipe. Macs haven't slowed my car down too much. 
Bruce
Macs are a good economical header option for our cars. They have been around for quite a while now and they will give you 15-20 rwhp over stock manifolds.
Granted the Mac cats suck, but there are ways around that if you have to have cats.
The Mac coating is also less than desirable when compared to the Jet-hot coating but you can have Macs Jet-hot coated if you want.
You can make Macs as good or bad as you want. They are a good and economical option if you want to keep your car internally stock. LT's will give you better gains on a cammed car.
I wouldn't bash the Macs. They are what they are.
Granted the Mac cats suck, but there are ways around that if you have to have cats.
The Mac coating is also less than desirable when compared to the Jet-hot coating but you can have Macs Jet-hot coated if you want.
You can make Macs as good or bad as you want. They are a good and economical option if you want to keep your car internally stock. LT's will give you better gains on a cammed car.
I wouldn't bash the Macs. They are what they are.
Teching In
Joined: Jun 2002
Posts: 27
Likes: 0
From: Pearland, Texas
Originally Posted by equandt
Granted the Mac cats suck, but there are ways around that if you have to have cats.
I have Macs w/cat and have been seeing a loss of power over the last 2 years, I'm guessing I've lost 40rwhp its hard to tell because of the new cam. Do the Mac cats plug up?
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
guys check out this link, i have some questions there can your answer them, or attemt to please?
https://ls1tech.com/forums/showthrea...506#post813506
https://ls1tech.com/forums/showthrea...506#post813506
The Mac cats just don't flow very well. FLP or QTP (or one of the Mac competitors) did a flow test on all the cats available and found that the Mac cats flowed the worst of the bunch tested. The Mac cats since then have been continously bashed. I may have mis-spoke when I said the Mac cats suck. I should have stated that they don't flow as well as other cats that are currently available.
Macs still are a good economical choice, you just have to realize that you get what you pay for.
Macs still are a good economical choice, you just have to realize that you get what you pay for.
i gained 21 hp and 20 ftlbs with macs, near or equal to that under the curve all the way across
i really doubt LT's would have been much better
people just want to justify to themselves spending what they did for they lt so they say things like macs will only give you 5hp though it is far from the truth
i really doubt LT's would have been much better
people just want to justify to themselves spending what they did for they lt so they say things like macs will only give you 5hp though it is far from the truth