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Old 06-17-2013, 09:14 PM   #1
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Recommended headers and midpipe

I have a 97 GT automatic transmission. Need to have a catted system for inspections. Previous owner installed Borla cutbacks but everything else is stock. I like the Borla sound but my mid pipe and headers are starting to suffer rust from the elements. All the LTs I look at say they won't fit automatic transmission. The popular recommendation seems to be LTs though. Any advice would be appreciated.
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Old 06-17-2013, 10:24 PM   #2
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If you need cats, your only option is shorties, which are totally worthless and a waste of money.
Look for a replacement manifold off a wrecked car or something maybe.
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Old 06-18-2013, 10:42 AM   #3
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You can get catted midpipes for longtubes, just fitting them is fun if you can even find a pair that fit and then if you ever have to remove the transmission the longtubes have to come out or at least one of them does. Not fun. You can get replacement stock manifolds for almost nothing on ebay and online classifieds so I'd look that route myself honestly.
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Old 06-18-2013, 09:57 PM   #4
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So reading between the lines the recommendation is change the transmission to manual.
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Old 06-19-2013, 02:25 AM   #5
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So reading between the lines the recommendation is change the transmission to manual.
You have to drop LT to change a clutch also
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Old 06-19-2013, 03:41 AM   #6
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Damn if you do damn if you don't. Lol
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Old 06-20-2013, 09:59 PM   #7
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So reading between the lines the recommendation is change the transmission to manual.
Get mid-lengths if you REALLY want headers and don't want to fcuk with pulling LTs to do any tranny work.
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Old 06-20-2013, 10:51 PM   #8
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Not as concerned of the tranny work as I am of a catted system. I need it for inspections. Almost all the LT say manual only yet the ones that do accommodate automatics state "not authorized for emission testing area." That makes me stay stock or go shorties and the word here is that shorties are a waste of money. Want to change the mid pipe but figured it made more sense to change headers at the same time.
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Old 06-21-2013, 08:43 AM   #9
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Changing the mid pipe takes all of 30 minutes provided the nuts that hold it on are cooperative. If you have a torch and hit them with a ton of liquid wrench the night before they should come off relatively easily. Headers... that is another job totally. The reason that most of the longtubes say manual only is because the auto trans is wider and they might not fit.

Also, with a NPI car you should be looking at other stuff besides headers...

-Gears
-Subframes
-J-mod
-Midpipe/catback
-Suspension
-Wheels/Tires
-PI intake

If you are looking to eventually do a PI swap then that would be when I would look at doing headers. My car actually has FRPP shorties from the previous owner and I'm under the assumption he did them when he dropped the 99 PI motor in lol. Doesn't get much easier to do headers than when they are out of the car.
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Old 06-21-2013, 11:35 AM   #10
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Mac fits autos. That's 99-04 idk bout older. Like Scotty said non pi needs more before long tubes since its not a MUST you need supporting mods before that.
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Old 06-22-2013, 01:29 AM   #11
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Ok let me modify the question then. A good catted mid pipe that will connect to stick manifold and Borla catbacks. I have the suspensions mods done already. Lowered on Eibach springs and Tokico shocks/struts. I have a set of 4.10 gears sitting in the box because no one professional will install them and I don't trust any of the hobbyist here. It sucks having this car overseas.
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Old 06-22-2013, 10:30 PM   #12
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The BBK catted H on mine fits perfect, sounds good and tucks up night and tight to the floorboards. For the money, its the best one out there.
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Old 06-23-2013, 03:35 AM   #13
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Ok. I wonder how well the BBK shorty Catted Zh would fit the MAC long tubes. Thanks for the info so far everyone.
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Old 06-23-2013, 09:06 AM   #14
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It'll be fine most likely. Some people are sketchy with mis matching brands
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Old 06-23-2013, 07:25 PM   #15
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Ok let me modify the question then. A good catted mid pipe that will connect to stick manifold and Borla catbacks. I have the suspensions mods done already. Lowered on Eibach springs and Tokico shocks/struts. I have a set of 4.10 gears sitting in the box because no one professional will install them and I don't trust any of the hobbyist here. It sucks having this car overseas.
A professional wont install them??? I mean the guy I had put mine in would only install it if I understood that even if he did it correct there might be a bit of whining and he didn't want me to come back and try and get free money, but no whine and I love them!!!
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Old 06-23-2013, 09:00 PM   #16
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A professional wont install them??? I mean the guy I had put mine in would only install it if I understood that even if he did it correct there might be a bit of whining and he didn't want me to come back and try and get free money, but no whine and I love them!!!
I'm in Japan. When I bought the car I didn't realize that saying Mustang to these people was like kryptonite to Superman.

---------- Post added at 11:00 AM ---------- Previous post was at 10:57 AM ----------

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It'll be fine most likely. Some people are sketchy with mis matching brands
I see the recommendations for matching brands but running into road blocks as MAC doesn't seem to have a catted H and BBK headers won't fit an automatic but they have a nice catted H. The list goes on and on. No hurry. Car gets inspected next year August. Planning ahead as I know I will need something to pass inspection. I know I can replace factory but if I have to do the work just figure I might get some benefit out of it.
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Old 06-23-2013, 09:19 PM   #17
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I'm in Japan. When I bought the car I didn't realize that saying Mustang to these people was like kryptonite to Superman.

---------- Post added at 11:00 AM ---------- Previous post was at 10:57 AM ----------



I see the recommendations for matching brands but running into road blocks as MAC doesn't seem to have a catted H and BBK headers won't fit an automatic but they have a nice catted H. The list goes on and on. No hurry. Car gets inspected next year August. Planning ahead as I know I will need something to pass inspection. I know I can replace factory but if I have to do the work just figure I might get some benefit out of it.
Oh yeah American V8 is like cancer to them
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Old 06-23-2013, 09:33 PM   #18
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Oh yeah American V8 is like cancer to them
Ohh heaven forbid if I opened up the hood. Simple things like wheel alignment they won't even touch.
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Old 06-24-2013, 06:49 AM   #19
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I have SLP catted x on my 04 and I love it.
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Old 06-30-2013, 06:42 PM   #20
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I've got bassani catted x pipe from American muscle and it sounds amazing and get compliments all the time!
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Old 07-04-2013, 09:08 AM   #21
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Why don't you call kooks or ARH? They do customs headers.
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Old 07-04-2013, 10:40 AM   #22
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Why don't you call kooks or ARH? They do customs headers.
$1200 for a set of stainless Kooks...
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Old 07-04-2013, 10:45 AM   #23
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I know they are expensive but I wouldnt say that much. I paid 900$ for mine. I have a 98 GT with a coyote engine (well is in the process of the swap right now).
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Old 07-04-2013, 11:10 AM   #24
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I know they are expensive but I wouldnt say that much. I paid 900$ for mine. I have a 98 GT with a coyote engine (well is in the process of the swap right now).
Straight from the Kooks website
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Old 07-04-2013, 11:40 AM   #25
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Ouch! Well try ARH where I bought mine
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Old 07-04-2013, 11:55 AM   #26
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ARH=?
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Old 07-04-2013, 12:01 PM   #27
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American racing headers. They are very good
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Old 07-04-2013, 01:23 PM   #28
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I've got bassani catted x pipe from American muscle and it sounds amazing and get compliments all the time!
+1
I got o/r x and catback from bassani and love it. Nice head turner and anyone who said anything about liked it as well
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Old 07-04-2013, 01:44 PM   #29
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I know they sell mid length headers as someone stated on here would be a good suggestions. Mids give both no fitment issue since they arent long like lts and are better than shorties along with the corresponding h or x pipe wit it should be fine. Sucks that your station is in japan and its true that american muscle is kryptonite to them
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Old 07-04-2013, 05:19 PM   #30
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I know they sell mid length headers as someone stated on here would be a good suggestions. Mids give both no fitment issue since they arent long like lts and are better than shorties along with the corresponding h or x pipe wit it should be fine. Sucks that your station is in japan and its true that american muscle is kryptonite to them
Probably me about the mid-lengths. I don't get why people don't love them.
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Old 07-04-2013, 05:28 PM   #31
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Don't they have shorties but equal lenghts?? That could be a good option also
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Old 07-04-2013, 08:55 PM   #32
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No it isn't. The stock manifolds are not restrictive. As I've said before the OP needs to sorry about a lot of other stuff before the headers.
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Old 07-05-2013, 02:39 AM   #33
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No it isn't. The stock manifolds are not restrictive. As I've said before the OP needs to sorry about a lot of other stuff before the headers.
You mentioned J-mod. What is that?
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Old 07-05-2013, 10:04 PM   #34
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Basically a very cheap and very effective way to make your automatic trans not suck.
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