any fitment issues with these headers?
what kinda added power will these yeild?
how loud would it get with the midlengths, or y and hooker catback?
how much are these things sellin for?
Thanx in advance
Travis

 

1. Dont believe so
2. 15-20rwhp maybe.
3. No cats = loud | no cats through a catback = mustang with flowmasters
4. too much money.

I would recommend just buying a set of Pacesetters for just as much money, and you will have a longtube header that will sound better and make more power. Check the sponsers.

 

just look on page one or two, there was just a discussion on macs vs LT's like a day ago.

 

i just found that discussion thread thanks guys
~T

 

just ordered mine for $439 shipped w/ the ory

 

Mind if I ask where?!? Thanks

 

yes, ill never tell lol... www.not-a-sponsor.com, i ordered them on the 29th and theyre scheduled to be at my door on the 6th, so if they come through that quickly they will have been great to deal with..

 

WTF dude.... Thats fucked up. Who cares if you tell me... Just PM me or e-mail me the place. Pleeeeeeeeeease

 

sorry i put the link there and completely forgot that it wont come up if its not a sponsor lol...my bad...ill pm it to you now

 

Im thinking about macs because im cheap.I have seen used ones from 100-250. did i say i was cheap???

 

me too!

 

Macs are a great header, especially if you don't like dicking around with fitting issues with the Pace Setters.

 

I had them and they worked well on my car, but I did pick up some power when I switched to long tube headers.

 

We are a sponsor, and we can go as low as $459.99, we have a few sets in stock.

Tom
www.ls1speed.com

 

Had them on my Z28, no fitment issues, I took my stock manifolds off and installed the macs and Y pipe in under 2 hrs. They never leaked, just make sure to torque from the center out...........

 

The big power gain is under the curve between macs and LTs. MACs are still a decent deal, easy to install and seal fine. No O2 extensions needed and you can get the y-pipe up there pretty high and not bang around.

 

I have installed about 10 sets of Mac headers over the years. Never had a problem with either set, all fit great, and worked well. I've seen a 23 rwhp increase on a buddy's car with STOCK INTERNALS. My car saw a 21 rwhp increase also with stock internals.

Mac's are a great header for the money and make just as much peak RWHP as a Longtube. Especially if you have the flanges modified and port the primaries.

Josh

 

Yep. I had the MACs on before I did H/C/LTs and was very happy with them. Combined with an LS6 intake, I picked up 30rwhp, so the MACs (with cats!) had to be worth at least 18rwhp. Easy install and I didn't have any fitment, or leak problems. You can get them cheap used as people upgrade to LTs. I let mine go for well under $300...