Catback for an '09 Grand Marquis?
- Thread starter 98 svt
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As a former 4.6 guy, I second your motion to use magnaflows! Skip the tips and keep the hidden turn downs. It will sound more aggressive in the car with turn downs, and it won't look dumb.
Flowmasters and an H-pipe. Itll give you that classic sound.
Bought my son a crown vic (police interceptor) and of course he wants it louder 
Not sure if hers is a dual exhaust or not (police interceptors have dual exhaust with a H-Pipe)
We went with flowmaster 40's and had a shop cut out the old ones and weld in the new ones. It was better but he wanted it louder, so now it's got SLP Loudmouths on it!!! The 40's would be probably be perfect for her.
Not sure if hers is a dual exhaust or not (police interceptors have dual exhaust with a H-Pipe)We went with flowmaster 40's and had a shop cut out the old ones and weld in the new ones. It was better but he wanted it louder, so now it's got SLP Loudmouths on it!!! The 40's would be probably be perfect for her.
40 and 50 series flowmasters will drone like crazy on the highway, and might even lose a hp or 2. Not to mention they are likely to rust out.
swap in some magnaflows or pony up cash to get a catback or full exhaust from stainless works. They sell kits for crown vics, grand marquis and marauders
your mom is super cool
swap in some magnaflows or pony up cash to get a catback or full exhaust from stainless works. They sell kits for crown vics, grand marquis and marauders
your mom is super cool
Yeah I'm really steering toward the Magnaflows.
Grammy will like I think.
Grammy will like I think.
A valid point was brought up, I bet this car doesn't have factory dual exhaust. Find a set off a wrecked P71 or something (P71's have no factory resonators). Have the mufflers welded into that.
These are exactly like Magnaflows and about half price!!
http://jonesexhaust.com/ProductsByText/MF/page1_50?nohighlight
http://jonesexhaust.com/ProductsByText/MF/page1_50?nohighlight
For those saying Flowmaster will lose power and rust out, you’re getting a little carried away. I ran a single 70 series FM on my ‘02 4.6 Explorer and when I sold it 8 years later, it sounded as great as the first day I installed it. No rust holes, no decreased performance and sounded fantastic with 0 drone. Here’s mine on the dyno -
I have to take a look, pretty sure it is dual exhaust. I know it has the Police Interceptor package. It was a special order vehicle through the Ford dealer my father worked for.
A single 70 has to be the quietest muffler they made, most people user 40's ,44's or 50's on cars. A friend of mine had a set of 40's on his marauder and they lasted 3 years before they completely blew out from rust.
They don't offer P71 parts on a grand marq, I don't think the handling & performance package even existed in 2009 either which means I'm not sure if you could even get dual exhaust in 2009 anymore.
The 70 was indeed quiet, but certainly a step up from stock and louder than you think. It had the FM tone at startup and when you laid into it, there was no questioning you had a V8. I originally did a 40 series with dumps, but it was stupid loud.
Maybe I'm wrong on her year then, but she definitely has the PI engine. It was a special order. The dealership my father worked at was responsible for working on the State Police cars. The Grand Marquis was a special order through the dealership.
Every panther platform vehicle got the "Performance Improved" engine starting in 2001 (new cylinder heads + intake manifold). Mustangs got them in 99. The only differences between a P71 engine and others would have been things that get bolted onto it, like the alternator, airbox, oil cooler and dual exhaust.
Sucks that Marti reports currently stop at MY2007
I'll have to investigate further. My father told us it was a special order through the dealer. Unfortunately, my dad can't remember the car anymore. I'll see if Grammy does. Haha
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