MAC headers
#1
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MAC headers
If I can get a set of MAC midlength headers and both offroad and catted y-pipes for cheap is it worth the gain in hp or should I wait and spend the extra for long tubes? TIA
Kirk
Kirk
#2
I think it's worth it if you can get them cheap enough but I would consider not using the catted Y pipe if it has Mac cats on it, supposed to be rather restrictive.
I would also consider porting the openings on the Macs for even better performance.
Macs are good LS1 headers and are somewhat under rated.
I would also consider porting the openings on the Macs for even better performance.
Macs are good LS1 headers and are somewhat under rated.
#4
If the price is right, get them! On a basically stock car, you will see very similar gains to LTs, but as always, the difference will increase if you do a big cam and such.
They are really nice headers!
-Todd
They are really nice headers!
-Todd
#7
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I just finished a v6 to v8 swap, and dyno'd the car at TEA this past weekend.
It's a used LS1 (85K miles), TEA 5.7 Stage 1.5 heads, 224/228/115lsa cam, LS6 intake, HS rockers. And a used set of MAC headers and y-pipe I picked up for $250.
392 hp.
That's with an automatic, a blower cam running na, and no timing tweaks yet.
The MAC's worked out well for me. I can't complain...
It's a used LS1 (85K miles), TEA 5.7 Stage 1.5 heads, 224/228/115lsa cam, LS6 intake, HS rockers. And a used set of MAC headers and y-pipe I picked up for $250.
392 hp.
That's with an automatic, a blower cam running na, and no timing tweaks yet.
The MAC's worked out well for me. I can't complain...
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#8
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I recently had a set of Mac mid length with Mac cats installed and picked up 12 RWHP. I picked up a bunch of torque at lower RPMs also. This is without a tune. I'm happy with them and they sound good.
#9
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im using macs right now on my 2000 bird and i love em yeah stay away from the catted pipe it is quite restrictive but also i goit mine for inspection and i got the mids for ground clearance i sit kinn alow but they are very good headers
#12
Restrictive cats
How do you all know that MAC's have restrictive cats, especially since all of your cars seem to have ORY's ? Also, does anyone have MACs with the catted Y and have NO banging problems. What fixes did you use, if any?
Thanks!
Thanks!
#13
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Originally Posted by watercool5
How do you all know that MAC's have restrictive cats, especially since all of your cars seem to have ORY's ? Also, does anyone have MACs with the catted Y and have NO banging problems. What fixes did you use, if any?
Thanks!
Thanks!
#14
I concur, MAC cats are of poor quality...we ran their catted H-pipe on a bud's '91 Mustang LX and they crapped out within about 10K mi.
If you must need them for Smog reasons, Carsound converters work well and are inexpensive. $60 shipped from ebay.
If you must need them for Smog reasons, Carsound converters work well and are inexpensive. $60 shipped from ebay.