1) Most aftermarket "Cold Air" intakes are really just under hood "Hot Air" intakes. If the air filter is not sealed in an enclosure that has an end opened to ducted cool air, you'll just be sucking warm less dense under hood air. Better is to use the 2004+ CVPI Air box assembly along with the 2006+ CVPI intake tube with an 80mm MAF - used 2006+ CVPI parts should be cheaper. 2) Forget the throttle spacers, and use a 70 or 75mm throttle body instead. 3) If you're just going to do some small bolt on mods, keep the stock intake manifold. The aftermarket manifolds will not provide a boost in power unless you are going to regularly run it at 5500 + RPMs. 4) Hollowing out the front CATs may give a boost in power, but hollowing out or deleting the rear CATs does nothing. The exhaust manifolds and stock exhaust system is more of a restriction. The front CATs are what are called "Pre-CATs". They are there mostly for when the engine is cold and warming up which is why they are closer to the engine. The rear CATs are there for when the engine is at operating rating temperature hence why they are further back in the exhaust system. 5) Most civilian CVs came with 2.73:1 rear gears. Swapping out to a 3.27:1 or 3.55:1 will give you snappier acceleration, but overall really won't make the car that much faster. I've got a 2008 CVPI with 3.27:1 gears that gets about 23 MPG or so @ 60 MPH. Also, since the 4R70 and 4R75 use splash lubrication for the tail shaft, using anything higher then a 3.55:1 gear requires modification to get more rear lube or the tail shaft seal will fail. Really, one of the best sites for the Panther platform is Chris @ ADTR.net, and Darrin @ BCA Transmissions - bcawebstore.com

Nice that you showed the catalytic converter how much it blocks flow .

Cold air intake is a waste of money 💰 a regular K/N filter works great 👍 the air box same as Marauders.

@OldeCarrAutoGuy Thank you for the reply. I've owned 6 Grand Marquis over the last 25-30 years. I get about 235,000 trouble free miles out of them "except changing the intake manifolds" before I buy another one. Right now I own a rare 2003 CTE "Custom Tasca Edition" that the late racer Bob Tasca started and his family carried that on. Thanks again!

Great content 👍🏾👍🏾. I'm making a to do list based on this video. Starting with fuel filter, so easy, cheap, and beneficial.

We have a 2004 Saudi Police Mk. of this car 'CV PI' here in South Africa, and we do not have the converters on the exhaust at all - the car sounds very different!! Lekker video 🇿🇦

The best thing that I will recommend ahead of time before the build like you said before drop in a cold air intake as well as some performance ignition coils. I own a 99 Crown Vic myself

Did the mustang rims bolt on with no spacing issues? Any rubbing up front when turning? Thanks.

Looks like GrandMa is shaping up nicely. Any thoughts of Supercharging?

Just bought the mercury marquis ultimate edition! I love it. Great video Jason.

Based on the state of that fuel filter, changing it probably gained you a half an mpg

I noticed that one of the cats had an O2 sensor on it. If you hollow out the cat, how do you keep from getting a check engine light for low cat efficiency?

Found you from Nick's Garage looking forward to watching your videos.

What’s the link for those wheels and center caps? I remember watching your videos a time back before my first car now I got my 05 grandma LS looking to get this look… 👍

I uncrimped and removed the heat shields on the rear cats, cut a c-shaped panel in the cat body and bent it open. This way i could completely remove all the material inside. Then, bent the panel back closed, reweld the seams and replaced the heat shields. Looks stock and no one is the wiser!

The stock intake is a cold air intake. It draws air from the wheel well which is outside the engine compartment. Aftermarket intakes draw air from within the engine compartment which makes them HOT air intakes. Put a shift kit in the transmission. You will have much more fun. Besides if you want a hot rod start with a lightweight car such as a Mustang or Nova. Sheeesh.

Hey I have four Mercury marauder chrome rims factory OEM. I was thinking about getting a black crown Victorian and making it look like a marauder clone. L71 Victoria, Or a black grand Marquis. Which one of those two is better? What do you think is the best bang for your buck grand marquis versus crown Victoria? Which one do you recommend for a marauder conversion

Really enjoyed this video!!!! Those cars will scream when done right

Budget might have an idea but if you are going to go thru all the trouble to add a manual transmission go all out and get a six speed! Other then that rock on Brother!

Smart decision on the high flow air filter. It has been proven that those cold air kits are useless. That air intake was designed for that engine. The only bad thing about it is they quieted it down.

Im on my 2nd 04 LS ultimate . Getting new Shocks x 4 with new airbags High cap air intake Rear cats hollowed out Fuel filter K and n air 4 new tires New fluids engine and trans New brakes Has 122k on it and is super clean all around . Picking it up in 10 days Paid 4500.

Very interesting video, enjoyed it, very informative thanks.

I think GrandMa is a GREAT vehicle. I have an 05 Grand Marquis and am constantly trying to get more ponies but stay in relative comfort n not filling bk up every 3 days lol. Love the videos!

I have a 2004 GM GS. I’m glad I ran across your channel because I have been thinking about some upgrades for my car. I’ve had it 5 years and I have 108, 417 miles on it. Did you put size 16 mustang wheels on it? Would you recommend just straight pipes over the catalytic converter? I want a nice sound and some more horse power.

Awesome video! Keep em coming! Maybe look into a off road X pipe exhaust. No cats. And the cold air intake would really make a difference. Ya Bubbly

Sir a year ago my grand marquis went on limping mode so i decided to cut off my CATs and my marquis was super loud

Seen a few videos where cold air intake on these make the computer all fooky . Spacer and filter is the way to go . My 2 cents

What rims do you have on this car? I’d like to replace my stock wheels and I like those

be-careful thinking can lead to trouble lol you know changing to a cold air intake has been known to help increase the sound a little, maybe you can keep an eye out for a good used one to keep it budget friendly. At least the throttle body spacer will kinda help the throttle body stay a hair cooler and give you a little more runner length to help with some torque

Where can you get a throttle body spacer?

Messing with those cats like that makes the exhaust sound clappy. There are other ways to get that thing to sing.

Can u do a video on how to change the spark plug wires on your mercury to help me out?

there ya go! gut the cats! the oxygen sensor before and after cats should pop a engine service light. good luck!

Dang....i got excited for a second. No boost = 😢.

glad i'm not the only one that calls them "grandma".

i'm putting quad glasspacks on my 2000 grand marquis piped out the side, should make a neet noise!

I got duals that come out in front of the rear wheels on each side

❤ Love the panther platform videos

Superchargers are always the better option for these old big block V8s. Reason being, they are less complex, and a Supercharger is less complex than a turbo which = less things that could go wrong. A Supercharger is more direct power as well.

In my opinion true performance starts in the drivetrain and this goes double for an automatic. The first thing I like to do with my automatic project cars is get them shifting harder/faster and keep them from wasting quite so much of the power they already have. I just put a really hard shifting servo that also reduces slip in my $600 Trans Am project and it cost me less than $200 bucks including shipping. TCI makes a valve body for GrandMa's transmission that does the same thing and it only cost about 160 bucks. The downside is it's a bit more difficult to install as you need to drop the pan. Apart from that, one of the cheapest performance mods you can do for this kind of car is to swap to the P71 interceptor driveshaft as it is lighter and puts noticeably more power to the ground, you should be able to find one in a junkyard very easily and for cheep. Jegs also has good converters for that trans. starting at 400 bucks and good rear gears for even less. Fuel mileage shouldn't be a real issue since the car already has an OD trans. A reasonably lower gear wouldn't have any worse effect on fuel mileage than the bigger injectors you'd have to move up to if you turbo or supercharged it. Speaking of power adders have you considered nitrous? A really good wet kit specifically for a Crown Vic 4.6 that you can safely spray an extra 150+ HP with cost about half what it would cost to turbo the car and the results would be comparable when the button is on, maybe even better. A cheap dry kit that you can safely spray an extra 75+ HP with cost even less but they have limitations, no fuel solenoid means your safe shot limit is much lower however some guys are supposedly running 125 and 150 HP dry shots on 4.6's with success. I think if you did the P71 driveshaft, Tbody spacer, cold air, and the TCI valve body it would be a sweet little package that altogether wouldn't be too difficult to install and wouldn't hurt the wallet to badly. If you wanna get crazy then throw in the gear, converter and nitrous and you'd be running with turbo cars for considerably less cash. I can send you a link to the forum where I just read the nitrous info or links to any parts I mentioned if you are interested. I don't really have anything to do on this fine Saturday so I figured I'd help you research some mods for GrandMa LoL

You gotta get rid of those reflectors on the trunk lid and replace them with the P71 or Marauder blacked out plastic and put a police Interceptor decal on it, just don't buy the cheap decals. They're not even close.

Have you checked the air intake temps? The air comes in behind the headlight and a cold air intake won't make much of a difference...

What does the throttle spacer do?

I HAVE A 2006 CROWN VICTORIA POLICE INTERCEPTOR WITH 40 SERIES DUEL FLOWMASTERS ON IT. IT SOUNDS AWESOME. I THINK THAT'S WHAT YOU NEED ON GRAND MA.

What wheels are those in the car in the videos cover pic

Will deleting the rear cats pop an check engine light

This is great! Like looking into a youth mirror! Lol

Do you have emissions testing in your area? Wouldn't drilling holes in your cats make you fail?

What type of rims are those

Couldn’t you cut the rear cats and sell them for scrap? I was thinking about doing this for my grand marquis to recoup some of the costs

I have a 2002 LS precision track with 136,000 miles I just bought for 2,500. I wish I had the money to restore it, it was a one owner, the guy is 91 years old and bought it new , drove it easy.

One hour later, from spogebob cartoon.🤣

how do you get 23-24mpg??? I get 19 highway on mine

You say it sounded really good with the tailpipes off but you didn't let us hear it!!!! Good tips tho feller!

Cold air intake is pointless without a tune. Your check engine light will come on for lean on bank 1 and 2 without a tune. I just did all of what you mentioned plus i did a j mod to the trans. but i also got a marty ochs tune and an sct x4 device. If you got the money that marty tune is where it's at. At least a 20 hp increase, better shift points, traction control disabling. Mo's speed shop is the best with these panther platforms.

Take the a/c clutch off, replace with custom bracket for turbo. Custom duct work obviously.....it works

I good tune up can make your car run better with some shell 93 gas.

Sounds good you can hear a big difference but it's still not loud enough😅

Another great Grandma video!! Nice choice on the center cap....Looking forward to the next chapter😊👍

I vote to leave the engine stock, and install a 5 speed manual. Lol

Need to start a go fund me page to get poor Grand Ma a turbo or supercharger

I have a 2003 Marauder and am also thinking of removing the rear converters.

You should see if you can find a panther center cap for your rims lol

What kinda rims or those

Those rims. Where'd you get them

Never knew they made a H.O 4.6 mustang lol

If you're going to do an exhaust do it right don't half ass it. I put cat back duels with Flowmaster FXs on my 02 Marquis

Should do open headers lol

#1 video. Thoosands and thoosands of views!

Should have put an exhaust cutout between the cats

How many miles are on Grand Ma ?..

Nope not yet!👍🍻

Cool

I thought $250 sounded awfully low. Yea don't spend too much money on the ole gal, but you should let your self splurge on one good $350 part or something. Skip the throttle body spacer and put the money towards a good intake manifold...or ignore and do whatever you want with your car! Haha

Headers maybe?

Theres Platinum in them there catalytic converters.

Still single exhaust?

There is no better intake then the factory intake.

The spacer is a joke, the car already has a 5" one curving up to the TB. Cold air intake is a waste of time and money because the motor moves so little air. Now the intake and exhaust will help but not much, you will need to re-cam to make any noticeable gains. Look into a 50 shot NOS set-up.

shoulda sold those cats up here they go for about $100 ea and used the $ to straight pipe her and get some more parts

You can get 3.73 gears out of a 5.0 explorer from junkyard

All you need to do is a gear swap to 3.73. You won’t think about the cost after your first test drive. I promise. That’s the path to the fountain of youth for grandma.

Dude why did you talk over the best part of the video with the open exhaust?

I took my muffler off and my Car move Felt Slower..

throttle body spacers dont do anything for fuel injected cars. dont waste your money on it.

My vote is for TWIN turbskies! #SMASHTHATLIKEBUTTON #LIKESHARECOMMENTSUBSCRIBE

Put a chip in it?

Just get a tourqe amp electric turbo 2500 bucks 5 boost 😄

I don’t even need to watch this to answer the question. Obviously needs a turbo.

Supercharger.

Just remove catalyst converters and straight pipe it

Your trapezoidal beard screams untrustworthy. Your choice in parts confirms my suspicions

She's heavy.

Then why do you have a video titled putting a turbo on a 2004 grand marquis if you think it is too expensive.

Check out ripp.com

I absolutely hate the fact that you call this car "grandma" because they're really the last "REAL" cars left I personally look at them as cool ass grown man cars they're a mix of luxury, muscle, style, speed and comfortability!!! I owna 2006 GS and her name is Mercy!! And we would appreciate it if you put some respect on her and her sister's names please and thank you sir.

MY MERCURY MARQUIS GS HAS 318000 MILES. IF I DO ALL THIS WORK TO MY CAR. IT'LL PROBABLY TAKE A POOP. NO THANKS. GOOD LUCK.

There is nothing in those rear ones. You’ll see

Clickbait title, if you’re going to upgrade, upgrade. Not have half a video saying you turbocharged the car just be about drilling out your cats. Without actually upgrading the cat to be sporty in any form, you’re just encouraging people to cause more pollution for a slightly louder car and such a minuscule horsepower increase. No I’m not from California, I don’t hug trees, I do like fast cars, and even have a panther myself.

nobody cares