Exhaust for 2000 GT, SLP or Flows
 

Hello,
This friday I added another car to my collections of mustangs. This one is a Triple Black GT convertible mustang, 2000 with 2003 hood. To get to the point, The exhaust is to quiet. I have been reading about The SLP exhaust system, with the 3 inch tips. Is it good? or should i go with Flows? Also is it a good idea to go with an offroad X pipe?

I have flows and a prochamber on my 01 gt, and it sounds ok. I didnt like the way it sounded before the prochamber though. I personally prefer the sound of MAC mufflers. You can go to www.mustangexhaust.com and listen to several different combo's.

Here is the slp with stock manifolds and stock h-pipe on a 2003 gt, launching.

Here is another clip of slp on an 03 with the same setup, I guess the difference is one is launching the other isnt.

Here is a clip from a from a 00 gt with 2 chamber flows, stock h-pipe, and stock manifolds.

Just for good measures, here is a clip of a 00 gt, prochamber, stock manifolds, and MAC flowpaths.

Hope this helps.

FLOWMASTERS!!!!!!!!!!

-Will

While I don't particularly like the sound....

If you are going for raising the exhaust note to some major decibels, Flowmaster is the one.
(Just don't drive by my house past 11 PM...) ;)

All I can say is that my SLP Loudmouth has been on order for over three weeks. It is supposed to ship this week, so I will let you know. Why did I choose this one and return my flowmasters?

1 - Loved the sound
2 - HP gains from the SLP that you don't get from the flows
3 - I wanted to be a tad different.

While I can appreciate that, I have had flows with a stock h-pipe and headers., and while it is better than stock sound, it is not that loud and it certainly isnt great. There are many more mufflers that have a much greater performance gain as well as a boost in sound. Anything straight through will not only have a better sound, but it will not be chambered like the flows. If you have ever seen a disected flowmaster, they are very restricted in flow. If you like the sound of flows, go for them. I have 2 chambers on my 90 and my 01 and I am sooooooo ready for a new sound. Every other mustang on the road has flows, except for the smart few.

Thanks guys,
Bigred90Gt, thanks for those links. I spent about two hours compairing exhaust and i think it is a toss up between the SLP Bassani , and yes Mac. I never realized how expensive exhaust systems have become. The one that i have on my 66 mustang is pretty cheap, although it is not much, just some 3 in pipe and race mufflers that dump out on the side. I still don't know which one to go with.

I personally have never used flowmaster mufflers, but I know many that have some flow 2 chambers, and they are quite loud.
Some of this can of course be attributed to other after market exhaust pieces (some had high-flow H pipes), but they were certainly much louder than stock.
(I guess it all depends on how you define loud...)

When I had the 98, I actually used a MAC setup.

They sounded quite aggressive without being as annoying as some other setups... much less of a "drone" at cruise speed also.

I also like the sound of a DynoMax setup...

As far as horsepower...
Anyone expecting to see much of a difference (if at all) on a dyno by just replacing mufflers is in for a rude awakening....

I would not go with flowmasters they are old tech. and dont flow that much over stock I would go with magnaflow magnapacks or slp I would stay awy from flows

I spent a couple hours comparing all the sounds too! lol

Sounds to me like the MAC setup is the deepest agressive sounding. While the others are high pitched and annoying.

Except for Delta (2 chamber) Flowmasters, they are loud, and deep, yet not annoying. But not as deep and agressive as MAC.

I personally like the sound of MAC the best :)

My setup after 3 systems...Magnaflow stainless pipes with Mac stainless mufflers. I can't get over the sound...low rumble with just the right amount of backpressure.

Yes, but you're cammed!! Big sound difference over stock mods.

Got a sound clip? I'd love to hear it :)

Is the MAC Prochamber California smog legal??
And is the regular H pipe California smog legal??

I cant decide between the Delta 40's and the MAC mufflers.. Someone help me?? Do they really sound that much different??

I want wich ever is deeper, more aggressive, and throatier...
HELP!!

Also.. what size is my stock piping and muffler inlets/outlets?

Thanks! :)

the mac pro chamber is not cali smog legal

the stock piping is 2-1/4

Ok, so is the MAC H-pipe (smog legal) worth the money to replace the stock H?

Or should I just keep the stock piping and just weld in some MAC mufflers?

MAC has 3 different muffler sizes... anyone know if the sizes make a difference in the sound?

That sound clip at mustangexhaust.com for the '00 GT sounds real real good!! I wish I knew which exact muffler it is!!

Anyone out there running MAC mufflers on stock H and stock headers?? I would love to hear it.

no cat is legal to be removed if the car has under 50k and or the cat is working

even the high flow catted mid pipes are not legal in cali due to the fact they only have 2 cats not 4 what most people do is buy a mid pipe that they like and when it comes time for the smog test they just swap them back to stock

and yes it will free up some power replacing the mid pipe but that cat back is done just for sound the most a bolt on 99+ Gt will pick up is maybe 2-5 if your lucky

Yeah I figured it wasnt much of a power adder... 300-400 bucks for an H or X and only for 2-5 hp gain... maybe someday when I'm rich.. LOL

I think I'm just gonna stick the MAC's on there keeping all stock piping. We'll see how it goes :)
I'm just after the sound anyhow!

Thanks!

no the mid pipe (h-pipe,x-pipe ) is worth the money but the cat back is not

Nothing wrong with adding a whole cat back but if money is a concern...having your stock muffs cut out and replacing them with aftermarkets ain't a bad move either...MORE AIR MORE POWER.

I'll try to get a sound clip soon...I'm busy modding my whole suspension this week...

I installed my SLP Cat Back today. Holy crap! That thing sounds nice. Deep and loud. Sounds very high performance. It is going to take a little getting used to as I would like to turn the volume down about 20%, but I have a vert.

My daughter rode in the car today, and did not comment at all about the volume. She's only 7 but notices things.

You need to hear this exhaust...it is really something. Sound clips are not the same as in person.

Yeah.. I'm sure sound recordings dont do it justice.. but if you guys can get to it, I'd love to hear both your systems...

Thanks a bunch!

Hey, if your gonna switch your midpipe every year for emissions you might as well get a mide pipe with no cats. That will probably make and SLP cat back WAY to loud for most people. My magnaflow sounded ok w/ the stock mid pipe, too quiet for my taste. Now that I have got my prochamber it just sounds bad, not too loud not to aggresive. Plus mid pipes without cats go for around 200$, and givesmore power.

Less $= more power:D

Yea. I think i am going to Go for the SLP. I like the way it looks. Although if i in stall the system i want to do the whole thing, all the way up to the long tube headers. Headers look like a pain in the ass to install on these new stangs. Are they? I need money to do this carp. Just got the car and everyone says that they can beat a Gt with a a v6 peice of shit or an import.

If you want to go SLP, my adbvice would be to start with the Cat Back and not wait to do the entire job. You may like the sound more than you think and may not want to change much more. You can always add later and you save $ by getting everything together as far as I know.

blownbyyou:

Where do you live in MD. I am in Harrisburg quite a bit. Perhaps we can meet sometime and you can hear the exhaust if you have not already.

I am all stock on the exhaust but the SLP Catback.

I live in maryland. I will be at both pony trails and National capital area mustang club car show in rockville md on may 1 and 2. on the first i will be crusing in my new car and on sunday the 2nd i will be in my 66. did you just install the cats? does everything line up? how is the quality? is it worth the money?

XXXBlakeXXX,
Your car looks just like mine. Although mine it triple black. Did you but the hood scoop on? Cause the guy who i bought mine on put a 2002 hood on it. I am also in the works of getting some 20 inch cobra Y2k rims :) is it an automatic or stick. mine is an auto i am thinking about putting a shift kit in it too.

I bought it used...bone stock. The hood was added and the side scoops by the previous owner. It had some minor front end damage and I presume that's when he changed the hood.

My car is a bit of a paradox. It's an '00 with '02 hood and side scoops and the grill delete like the '96 - '98's. Oh well. I like it the way it is.

It is a 5 speed.

I just dropped the catback in on Sat. The quality is perfect and everything lined up "on the money". If you have a lift, this is a 20 minute job as long as you have some spray to lube the rubber exhaust mounts to pull the old exhaust off. I also, cut the old exhaust off which saves time.

My buddies lift was occupied, so we had to use jack stands. It took an hour. The exhaust tipes are really nice. I would say that they have to be worth $100 just for them.

The sound is really nice. Try to hear one live if you can. It may be a little loud for some with a vert. If it had a volume switch, I would turn it down about 20% for my taste, but I still really like it.

It makes an awesome muscle car crackling when you down shift and is just trully amazing at WOT. To those that have heard it, they ask if I have an off-road X pipe too, if that gives you any idea.

I will be at a Mustang and Ford show in Pa on May 30th. here is a link:

http://www.homestead.com/vfmc/

Click on "our car show" on the left colum.

I will have a booth or tent there selling raffle tickets for a 2005 Mustang GT to raise money for a charity that I run (childhood cancer). I am looking for some girls actually (19+) to help sell tickets (whatever works lol).

why did you have to cut the old exhaust out? to save time? see i think i would just un bolt it so when time to take it through inspection i could just bolt it back on. I have a lift that i use to restore cars and a whole bunch of parts. So it should be no problem, all i have to do now is find some money.

Since Ford welds on the exhausts you have to either cut it out, or drop the entire rear end to take it off. I had no use for the old exhaust and the added labor I was not interested in.

You wanna talk about mean sounding. Here are my exhaust mods.

Long Tube Headers 1 3/4 primaries, with 3in collectors
Home made H-pipe, Two Chamber Delta Flow Flowmasters with Dumps.

I'll see if Tim C can help me get an audio file to post. It just sounds wicked at idle it sounds damn down right mean and ready to breath some fire...at Wide open at 7000 RPM it just screams like no everyday driver I've heard before. It sounds deep, aggressive, throaty and you name it.

Yea i did not think about the part that goes over the axle. Your right that damn thing needs to be cut out. that should make life easier. I guess the SLP exhaust has something to fix that problem on there own system like a 2 peice kit.

Oh I know wicked exhaust. I hang around 2,200 hp drag cars, which make your balls shake. MY 66 has long tube headers and within 6 inches where the exhaust connects is the the delta flow and then right after that they dump out. great for when i go out on bad dates cuase i can't hear what they are bitchin about. oh and it is awsome for setting off car alarms.

Hell yeah it is!

Here is a video of a cammed 4.6 with an o/r x pipe and a SLP catback. I must warn you, it is ear shaking loud, especially when he takes off down the road. Please right click and save to your computer.

http://www.eastcoaststang.com/nitrolew.mpg

After watching this vid, my delima is now do I want the all out loundess of the SLP (accompanied by the sloppiness of the SLP) or do I want the loud as hell, but clean, sound of the MAC catback. I am really torn between the two.

I love that cam sound.. but definately could do without the raspy & distorted wide open exhaust sound.

I'm gonna go with the MAC mufflers :)

Do you know what cams are in that car?
I love the video!!
Thanks

Comp Cams 270's. That idle is at 1000rpm too, imagine how lopey it would be if the idle was brought down to about 800 or so rpm!!!!!

Ok.. why do they have the idle set so high? Maybe the computer will trip out constantly trying to fix a sloppy idle if it was set to like 600-800 rpms??

Thats the "XE270AH" 234/238@.050
Sounds awesome!!

I would be going with the "XE268H" 230/236@.050
Anyone know how much of a SOUND difference there is between the two??

Man I love that lopey sound!!

I think he said he was getting it tuned pretty soon. Maybe, I dont remember. I'm fairly new to that board. But ya, I love the lope of a cam. I have the b303 in my 90, and it sounds pretty sweet with the exhaust I have on it.

Have you looked at VT cams? I was checking out some threads about their cams, and I have seen some pretty impressive numbers so far. I'll look for the thread about the Stage 2's on a bone stock gt making something like 22 rwhp, or something along those lines. The numbers might be a little different. I'll look for the thread.

Caymon

Well to be honest.. I'm not after the highest numbers... simply because I am in California, have to pass the test every year! :(

So I am pretty much just looking for the sound and small gains in numbers... but must still be sniffer friendly.

The VT cams are out.. they are way to big from what I've heard. Thats why I think I have to go with the comp 268 instead of the 274h or the 270ah

Some how I have to find a way to hear all these cams and also see which ones will still pass smog out here in CA

DAMN SMOG!!

Here Here is the thread. The first post says it all. 00 GT Only mods are VT stage II cams, valve springs, and flowmasters. 27.4 hp 11.4 tq.

The stage 1's might be able to make smog, but there is still some debate on that, as no one has said wether or not they could pass.

I totally understand your need to stay smog legal. Texas (mostly Houston) has some serious smog standards.

WOW.. That VT stage 2 sounds so awesome!!

Can we say BIG BLOCK!!!! haha

thats nitro lews car

Correct sir. And it is bad!!!