1996-2004 Mustang (GT) Comp Cams Stage 3 Xtreme Energy XE270AH Camshafts Review

1996-2004 Mustang (GT) Comp Cams Stage 3 Xtreme Energy XE270AH Camshafts Review

Hey, guys Adam here with americanmuscle.com. Today, I’m bringing you a detailed overview
and installation of the Comp Cams Stage 3 Xtreme Energy XE270AH Camshafts which are
available for all ’96 to ’04 Mustang GTs. So in this video, I’ll be going over the sound
you can expect at idle from these cams as well as the power gains when adding them to
your GT. On top of that, I’ll talk about the application
and the street drivability, if any, with the cams. And I’ll top the video off with the installation. I’ll let you know up front that’s going to
get a full three out of three wrenches on a difficulty meter. This one is probably going to be best left
up to the professionals or the guys who really have the mechanical expertise to get it done. The Comp Cams Stage 3 Xtreme Energy XE270AH
Camshafts should be on the build list of any modified and ’96 to ’04 GT owner who’s looking
to really improve their mid-range gains in the horse power and torque area as well as
pick up a pretty hefty noticeable lope at idle. So it’s a pretty well-known fact when we’re
talking about valve train technology that Comp Cams is one of the industry leaders in
that field. So no-brainer to look in their direction if
you’re looking to pick up a bigger cam. Now for your single overhead cam, two valve
motor, if you are looking to pick up that bigger cam you can expect bigger gains when
it comes to the mid-range power band as well as picking up a bigger heftier lope at idle
to really give it that muscle car sound. Everything I just mentioned from mid-range
gains to a heavy lope at idle is everything you can expect from the Stage 3 Cams from
Comp Now, Comp lets us know that you can expect
power to be ranging all across the power band from 1800 RPM to red line at about 5800 RPMs
but of course, the bulk of that can be coming in and can be expected to come in the right
around the mid-range like I mentioned before. Now, with that comes a heavier lope because
this is one of the bigger cams given it’s a stage 3, the XE270AH cam we have here, is
gonna give you that heftier lope. You can expect a heavier noticeable sound
when you’re idling at that red light. Definitely, something you want from a stage
3 cam, something you want from a muscle car in general. So as I mentioned before in the beginning
of the video, this is going to be geared more toward the modified 4.6-liter Mustangs. Simply because this one is a bigger heavier
cam that does require a lot of support. Now, speaking of support, Comp Cams highly
recommends picking up in addition to this the Comp Cams beehive valve springs to really
support the proper installation and to prevent any clearance related issues you may have
while installing these. On top of that, they also recommend picking
up brand new valve spring retainers which of course can support everything that you
have going on especially the high-pressure springs you’d be installing as new. All this is highly recommended you can get
away with other brands but of course picking up a Comp Cams camshaft would definitely be
supported by a Comp Cams spring as well as the Comp Cams retainers. Like I said some of those things you can do
without, but it’s highly recommended to pick those up. There’s also a couple more things that are
leaning more toward on the required side of things when you’re installing these. They’re basically designed for 355 gears or
steeper and if you’ve got an automatic transmission, a 2,000 plus stall speed converter should
be also installed as well just to get this running properly, that’s more again on the
required side of things. So, if you’re picking these up, tack all those
costs on to the final price there when you’re shopping around. So when it comes those modified 4.6s there
are a few things that you would already need to have on your Mustang in order to support
the Stage 3 Cams including an intake, maybe a full exhaust of course the cold air intake,
the throttle body, those things all put together tied in with the Stage 3 Cams will really
maximize all of the performance. Just sticking a Stage 3 Cams on a completely
stock 4.6 will not have this thing running the way it should be considering it’s such
a big cam, it needs those supporting mods. There is also one more thing I’m gonna throw
at you. That is a very good idea to pick up which
is going to be the adjustable cam gears. Now, when you’re setting up a bigger cam like
this, you are modifying the camshaft to crankshaft centerline position so adjustable cam gears
can help you fine tune all those little details to make sure this thing is running at its
maximum potential. Tying all those parts, I just mentioned together
in addition to the 270 cam we have here, all of that can expect to make around 40 rear
wheel horse power as well as 30 to 40-pound feet of torque. That’s something a lot of the customers are
claiming, who have reviewed the product and applied it to their own 4.6. Of course those numbers are just ballparked
figures, it all depends on your personal modifications so don’t expect exactly 40 horsepower, it
may vary depending on your own setup. Just to give you a few more specs on these
cam shafts. Just to give you an idea of what you’re working
with. At a duration of 50,000, you can expect 270
on the intake side and 274 on the exhaust side. Just to compare those numbers to the stock
cam for the guys out there with non-PI heads, you have a 200 on the intake, 209 on the exhaust
and of course guys with PI heads bump that up to 201 one on the intake and a 210 on the
exhaust. Noticeable difference when compared to the
Stage 3 Cams. So obviously there is a big difference there. Now with those big jumps from the factory
duration to the duration of the Stage 3, 270 Cam, you can see exactly where the improvements
are coming from. This is exactly what’s going to produce that
heavy loping sound at idle which is something a lot of people are striving for when picking
up new cams. Some of you guys may be looking after the
power gains. Some you guys maybe just looking after the
sound gains. Some of you might be a little bit of both. I myself I’m more interested in the sound
gains, but of course, if you’re looking for the power it’s there. If you’re looking for the sound, it’s definitely
there. So this one is a good cam to cater to the
guys out there who have modified 4.6s and are looking for best of both worlds. With that in mind, I do want to point out
this is one of the more noticeable street cams available on the market. The Stage 3 Cam is probably coming around
one of the last options as far as street drivability. This one gives you the heavier lope. It gives you a deeper lope at idle and noticeable
sound and the power gains at mid-range, but of course, all that tied together still leaves
you drivability as far as daily driving concerned, and it’s something you can easily do on the
street without running into any issues. Now if you move up to a stage 4 that might
be a little bit of a different story. So the stage 3 might be the cutoff line there
as far as the comp cams options are concerned. Now, if you are interested in picking up the
sound and power that this combination makes, now you’re looking at spending around $600
which is a very average price tag when it comes to the camshaft alone. Now, you get everything you see here literally
just two cams for your single overhead cam motor. With that said $600, a very average price
tag but you want to factor in all the additional pieces that you need to throw in to get this
thing running properly. If you are going with the beehive valve springs
that adds a little bit more pricing to it as well as the retainers to go along with
that. Now, if you’re going with third party options,
you still gonna tack on that price here. And of course, if you’re not doing this yourself
as far as installation goes the labor tacks on even further. Now, If you are still interested you’re getting
power gains again around 3000, 3500 RPMs dead center in the middle of the power band there,
were for the maximum potential this offers. Just to give you a solid idea of what to expect
if you are looking to pick these up with the $600 and additional parts after that, expect
to spend just north of $1,000 for a proper install if you’ve got somebody you know doing
it for you or if you have a helping hand doing it yourself. With that said, if you going take it to a
mechanic, expect another $1,000 at least for the labor alone. So, this is a pretty pricey install, this
is why it gets the three out of three wrenches on the difficulty meter, but I’ll touch on
that install in just a second. So, this one is definitely going to test the
tool box as far as the install is concern. It requires mechanical expertise. If you’re not comfortable doing it yourself,
no shame taking it over to a professional but then, of course, you’re gonna have to
tack on the labor cost because this one does take several hours if not a full day in the
garage to complete. The three out of three wrenches on the difficulty
meter can be attested to. Taken off the intake manifold, really dig
into the cylinder heads by removing the valve covers, removing that crank shaft, pulley
or spark plugs. It really goes the entire nine yards for this
one which is why I get such a higher difficulty rating and takes so much longer to complete. Just to wrap up the overview and install we’ve
got for you today, if you’re the owner of a modified 96 to 04 GT, and you’re looking
to pick up one of the heftier lopes for drivable street cam. While also getting mid-range power gains close
to about 40 rear wheel horsepower and 30 to 40-foot pounds of torque you might want to
check out the Comp Cams Stage 3 Xtreme Energy XE270AH Camshafts which of course can be found
right here at americanmuscle.com.

About the Author: Michael Flood


  1. You gave the wrong cam specs. There's no way that is 270 duration at .050, 270 is the advertised duration. You need to research and understand cam lingo a lot more if you want to be half as good of a reviewer as Stephanie and justin. Just my two cents

  2. What type of mods are they asking that you should have before putting these cams in again?

  3. He gives the wrong specs for the cam at 4:30. He states that the duration at 0.050" lift is 270 & 274. That is the ADVERTISED duration. The duration at 0:050" is actually 234 int./238 exh. according to summit racing. According to some stuff I found on the internet, the stock pi cams have a duration at 0.050" of 184 int/.196 exh. But I don't know it that's accurate.

  4. Can someone please help. I have a 2000 mustang gt with full exhaust and headers. The other day i was doing an oil change and i broke the rear o2 sensor with the lift. I replaced the o2 sensor but i can not get the check engine light to stay off now. Any help from fellow mustang lovers would be appreciated.

  5. Comp Cams …lol … their machining was off which they acknowledged over the phone then twenty minutes later called back and said their engineer was wrong. The machining was fine. Btw … their original version of adjustable gears caused problems with the cam sensor picking up a signal from the lock down screws. Caused a P0340.

  6. So 2k for 30-40 rwhp? Or you can spend that much and get a supercharger piece by piece for $1500 giving you at least 100 hp. Not worth 2k for 40hp

  7. I have these cams and my car fills slower I have full bolt on also not sure if I would recommend theses cams

  8. i have a fully stock 4.6 with stage 3 comp cams, no uprgraded valve springs, nor a tune and its been it's been running for 2-3 years and i still keep up with 2018 vettes 👀

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