4.6L SOHC/COBRA & 5.0
CAT-BACK "BACK YARD" INSTALL
Written by Mustangworld.
of pics, I hope your on the net at 28.8 or faster.
Triple Plated Chrome Mac tailpipes after install.
is nothing that says "I have a modified Mustang" louder than a killer
exhaust note. The Mustang GT base product already has a great sounding
exhaust system, but for those who want more, there are many aftermarket
exhaust systems out there to fill your bill. We here at Mustangworld do
all our own installs, superchargers, tranny's, cams, heads, axles, etc.
When it comes time to choose a product, we look for three things: Price,
Ease of installation & performance. If you can find a product will
all of these features then you have a winner. The Mac cat-back exhaust
system is a winner. It get's our prize as the easiest to install, most
bitchn' looking, sounding and cost effective exhaust system for the 4.6L.
off it only costs $239 (1-00 update: Price ranges from $239 to $299 depending
on model year). That's a great price for what you get. There are also
no muffler clamps or gaskets to worry about. The mufflers are welded in
place. The muflers are tucked up and ride higher than the stang's own
chassis. The tips are triple chrome plated 16 ga steel. The system is
HTS coated and have welded (not rolled) seams. The sound characteristics
off the muffler is like a Dynomax and Flowmaster put together. A very
deep bass rumble with a little high-end ripple, all under throttle control.
It makes your 4.6L sound like a 5.8L ! The fit and finish are excellent.
is a good power increase in the 2000 RPM to 4000 RPM range (and above),
you can feel it at the gas pedal. This is also the RPM range where the
mufflers produce the sweetest sound. Any person or car near you will now
"feel" your presence. Let's just say the exhaust sound turns heads big
time, double takes, triple takes and so on. The sound is not "obtrusive"
in any way. You'll never get yelled at for having a loud stang unless
you mash the pedal at the drive through window or something. You can be
as nasty as you wanna be. It sounds like a serious performance machine.
All this rumble with the stock (6 catalytic) h-pipe AND stock headers
in place! It has every other sports car on the street "running for cover".
The system also "looks" great.
hear this system and compare it to others on our sound
page. We were simply not able to capture the true "bass" of the system...
it overloaded our mics! In real life you can "feel" the sound.
of the Mac 2 1/2" Cat back system was very easy. The hardest part about
the whole install was removing the old stock system (which required hacking
the old pipes), but with a little planning the whole install can be done
by only one person and in only 2 hours. We like to work slow. If you rushed
it, you can do it in 30 minutes. Take your time, do the job "right". Installation
is similar on a DOHC Cobra Mustang, SN95 5.0 or for a 3" Cat-Back system.
HERE WE GO!
This is what comes in the box. 2 Flow Path Mufflers
welded to the extender pipes. 2 chrome plated tips. Instruction
sheet & mounting hardware (bolts/studs & nuts). No muffler
clamps or gaskets needed ! The system looks so good, you'll want
to hang it on your bedroom wall instead of your stang !
plated exhaust tips (2). They look incredible. they are taper cut
at the ends. To call them chrome "tips" is not quite accurate, it's
chrome from just after the rear axle all the way to the back ! This
is chrome that would make Harley Davidson proud ! (BTW Mac also
makes Harley exhaust systems).
With a 3 ton floor jack we lifted the rear of the
car from the center of the axle. We then lowered the car onto two
steel ramps and further braced the axle with 2 jackstands on each
side. The jackstands are there only as a backup and carry no load.
We wanted the suspension loaded (on the ramps) to make sure we could
check the exhaust pipe clearance in every place. We here at Mustangworld
are safety freaks. Get those safety glasses on now also.
This is where we are going to make the cut in the stock pipes. Just
after the pipe leaves the stock muffler. This is just before the
pipe bends over the rear axle. The stock pipes must be cut, there
is simply no way to remove them without dropping the rear axle (a
pain). By cutting them, we can remove them easily. This was the
straightest place we could find on the pipe, in case you want to
re-use the stock pipes with a muffler clamp over the cut.
USE SAFETY GLASSES ! We used a reciprocating power
saw. You could also just use a hand hack saw. To prevent the pipe
from bending during the cut, have your buddy hold the exhaust pipe
at the tip in the rear of the stang.
The stock pipe after the cut. This may look difficult
but it's really not that hard to do at all, even with a hand hack
saw. There is plenty of room to get a hand saw in there. We worked
on one side at a time, after installing the Mac system completely
on one side, then we started on the other muffler.
Next, un-bolt the rear muffler hanger assembly. It's
only one 10mm bolt. Don't try to work the pipe out of the hanger
while it's up on the car,why? It's a pain in the butt ! It will
be much easier to just un-bolt the whole assembly and remove it
on the ground. You can now remove the entire rear tailpipe section
from the back of the stang.
Spray some WD40 on the bolts before removing the
nuts that hold the front part of the muffler to the h-pipe. Remove
the nuts and leave the muffler hanging on the bolts. the muffler
is still being held in place by a rubber muffler hanger (at the
rear) that we'll un-bolt next...
Here is what the Mid muffler hanger assembly looks
like. Just un-bolt the whole assembly (2 x10mm bolts). Lower the
muffler down and pull it back to remove it from the h-pipe.Remove
the stock muffler from the rubber hanger down on the ground...
Use dish soap to slick up the surface to remove the
rubber hangers easily. Don't use grease or oil. Soap will dry and
the mufflers will stay in place. Certain oil or greases could damage
the rubber mounts overtime.
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