Magnaflow exhaust cat back - read inside!

Cat Back w/"H" pipe please.
If it's fabed out of SS I don't even care how much it cost$!
 
2.5" H pipe or X-pipe and I would be interested.
I was quoted around $700 for a custom catback system, and would still need the h-pipe/x-pipe custom made.
I would like a complete system to bolt up from the manifolds back even if it was 2 parts.
I don't need nor want a complete full length header setup for a long time. even when I did get to higher power levels 2.5" will still be fine. Once I get near the point of 500hp to the wheels then I'll consider 3" all the way back with headers. I had the full bad ass exhaust on my Cougar and thought it was great for about 2 months. After that i got sick of the constant rumble/drone and crazy looks at every stop light. I like a sleeper that sounds mellow when idling and roars when you stomp your foot down.
See this link from Magnaflow about exhaust size.:
http://www.magnaflow.com/07techtips/faq/question10.asp
 
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cougar9150 said:
2.5" H pipe or X-pipe and I would be interested.
I was quoted around $700 for a custom catback system, and would still need the h-pipe/x-pipe custom made.
I would like a complete system to bolt up from the manifolds back even if it was 2 parts.
I don't need nor want a complete full length header setup for a long time. even when I did get to higher power levels 2.5" will still be fine. Once I get near the point of 500hp to the wheels then I'll consider 3" all the way back with headers. I had the full bad ass exhaust on my Cougar and thought it was great for about 2 months. After that i got sick of the constant rumble/drone and crazy looks at every stop light. I like a sleeper that sounds mellow when idling and roars when you stomp your foot down.
See this link from Magnaflow about exhaust size.:
http://www.magnaflow.com/07techtips/faq/question10.asp
Click to expand...

That is an excellent link...as some of us old time muscle car drivers learned way back, the guys with the 3" dual exhausts couldn't understand why they were losing their "low end". I've even seen it on some of todays cat back systems.
 
Thanks. I learned it the hard way, even though I was told by someone with much more experience at this stuff than me. No need for giant pipes if your not making the power to use them.
2.5" would be great and provide plenty of room to grow. Unless I'm bottled up and need more top end power I'll probably stay at 2.5". By the time I'm producing enough power to need 3" pipes I'll have the tools in the garage to do it myself.
Here is another interesting link that basically says the same thing.
http://www.torquetechexh.com/whichsize.htm
 
well some updates... they dynoed the car with the stock setup... (well, the original owner had some hack muffler shop throw on some 40 series blowmasters) and she was at 267 RWHP... (he didnt have the exact number in front of him but he knew it was high 260's... i will know exactly before and after numbers)...

They dismantled the system and fabed up a 2.5" SS cat back system with an x pipe -
xpipe_cell.jpg

and stainless chrome tips 24" long, i think thats what he told me.

They are one of my sponsors for my prostreet silverado - 800rwhp... here is a picture of the TRUCK EXHAUST with DUAL electric stainless steel cut outs, and 3" mandrel bent pipe with and x pipe and high spun mettallic cats... $4000 exhaust system, including LT headers....
donepic1.jpg

http://i56.photobucket.com/albums/g194/usabodyguard/truckdtl_main1.jpg
anyways, I will post up after pictures of the new system for our cars... I will be starting a group buy, as long as the moderators on this site are cool with it... I already spoke to MF about a group buy and they said yes...

I will start a new thread once I have the details
 
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Depending on the cost I am in for the group buy or solo if you cannot get enough people for the discount. This will be my birthday present if Magnaflow will be ready for production units by the end of January. Shoot I would even test a Beta kit if they wanted to test a second one. It would just have to be shipped to Florida and I'm sure there are plenty of local Marauders they could try it on in Socal.
The truck exhaust is sweet!
 
2.25 mandrel bent is more than enough for a lot of these cars. Look how fast mustangs are w/ 2.25" cat backs. 2.25 mandrel bent is still worth doing over 2" pinch bent stock exhausts. I'd actually prefer a 2.25 over 2.5 on my car. It will flow enough and keep the noise down. When I do mine though I will just buy stainless tubing and some mandrel bends and weld it together in my garage

PS what is wrong with his X pipe? It has smoother transitions than some of the SS ones guys weld up from pipe stock, that will have ridges inside.
 
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How hard to modify the Marauder system to fit an 03-04 CV? The later model CV kit takes some modification to fit the 03-05 and it does not have an H or X pipe. The Marauder kit would also have the (for us) straight tail pipes with the nice tips. If it wouldn't be too hard to mod than it would be a better buy for me than the CV kit. I already run Magnaflows on my stock exhaust and love the way they sound.
 
i have a tendency to believe a multi million dollar R&D team over an unsubstantiated claim on a message board when debating a question of good and bad X pipes, in all due respect... and the team at MF has a practically limitless budget for testing... I saw their 35K sq foot test and build center personally... here is just one section of this huge facility - my truck on a lift -

magnaflow_truck.jpg


and for the record, I asked the very question - why this X pipe, why not traditional style? (yes, they do sell both styles)... they used to offer the typical x pipe standard, and said the flow numbers on this new one was far greater, and then he went into some tirade about gas laws and fluid dynamics because gas is a fluid... after that I lost him... but essentially he told me than ran tests for months to try and design a better X pipe...
they have...
and the numbers proved that they have done so.

I would love to hear your rebuttal with facts of course... that way i can go back to magnaflow and tell them they are not making a "good" x-pipe... and that they should contact you, of course!

:lol:
 
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usabodyguard said:
i have a tendency to believe a multi million dollar R&D team over an unsubstantiated claim on a message board when debating a question of good and bad X pipes, in all due respect... and the team at MF has a practically limitless budget for testing... I saw their 35K sq foot test and build center personally... here is just one section of this huge facility - my truck on a lift -

magnaflow_truck.jpg


and for the record, I asked the very question - why this X pipe, why not traditional style? (yes, they do sell both styles)... they used to offer the typical x pipe standard, and said the flow numbers on this new one was far greater, and then he went into some tirade about gas laws and fluid dynamics because gas is a fluid... after that I lost him... but essentially he told me than ran tests for months to try and design a better X pipe...
they have...
and the numbers proved that they have done so.

I would love to hear your rebuttal with facts of course... that way i can go back to magnaflow and tell them they are not making a "good" x-pipe... and that they should contact you, of course!

:lol:
Click to expand...
No rebuttal of facts - X pipes make the most peak hp - period!
They do so at the sacrifice of low end torque.
The total peak gain/loss between the two is almost always in the single digit #'s but the shape of the curves and the rpm at the peaks can be significant (not always). I also like the way H pipes sound over X pipes.
If I could choose I would always prefer an H pipe for a car that is primarily driven on the street - Xpipes for dedicated racing w/driveline mods to work w/higher rpm peak #'s - IMHO
 
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I think most people will agree that an H-pipe will give you more power (mainly torque) low in the rpm range. (something that the Marauder needs!)
It will also have a deeper (better sounding) exhaust tone.
The X-pipe have a more of a raspy metallic sound. I think most people prefer the H-pipe sound on the Marauder. And are willing to make that small sacrifice in peak power.
 
First off, thats a very nice truck

Secondly, no rebuttal as X pipes make more HP, but they dont sound as good on our cars as an H pipe. Offering this kit with a choice between H and X will draw more people to wanting this kit, instead of the people who will only buy it if it has an X or an H pipe with it.
 
Its gotta have a H pipe if I plan to invest in it. The small sacrifice of power is a small price to pay for a system that sounds really good.

Otherwise, Im looking forward to some results!
 
Here's a rough but I think fair side by side comparison from YouTube.
The car on the left and first to rev is my stock tune 2002 CVPI P71,it has all 4 cats replaced with Magna Flow high flow cats,Magna Flow mufflers(part numbers unknown),an H pipe,stock diameter pipes and Magna Flow non resonator tips.
The car on the right is sanco's,a 2003 CVPI P71,tuned,with 2 1/2" custom pipes,Magna Flow mufflers and an X pipe.
I'd tend to believe they probably flow the same numbers but the difference in sound is mostly due to the H & X pipes.
I think mine sounds more like an American V8 and sanco's has more of a Ferrari type growl or snarl.
Hey Blackened,your MM was born on my birthday!
http://www.youtube.com/watch?v=HEhftBGawlk
 
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OK... very valid responses, and thank you.

well I went down today to pick up the MM and while it was completed, I wasnt excited about a few things, namely the 2.25" pipe (not 2.5" like originally promised)... the tail pipes are about 10" smaller than the stock ones AND the sound... along with a couple of minor things that they are going to fix... so I did not pick up the car, which sucks because they are 2 hours away (each way :bigcry:)

When I test drove the car i was disappointed in the sound, or should I say lack thereof... it was dead quiet... :eek: I felt like i was driving a completely different car...

he did say that the X pipe makes a huge difference in sound, it quiets it down tremendously... that and they had 2 large mufflers which doesnt help either.

So while i waited they swapped out a small set of polished mufflers, and I took it for a drive... yes they were louder, but still NOT that classic marauder sound... So i left the car there for another 4 days, they are going to redesign the system...

I think I will discuss a 2.5" system with a 2.5" H pipe... and straight through mufflers (round)...

look, at the end of the day, they are building this system specifically for our cars.... any logical input as far as what you guys want in a cat back exhaust would be appreciated, they want to market this system to you... marauder owners... and yes, they will be reading this thread.

D
 
All i can say is stock Marauder sound times 3 or 4!!! Low, mean and and able to scream insults at the car next to you. No raspy sound, no glasspack hillbilly sound, just attitude!
 
once it gets worked out will MF post it on the web site video demos like they do with their Mustangs? I would love to see and hear a MM do a drive by like the other cars. and it would be a valuable tool in helping me choose a system.
 
I'm all about the X. People that perfer H-pipe's tried an X with flowmasters. LOL

That exhaust work on the truck is SICK...Very quality. As for the haters of that design on that truck...The numbers don't lie. X's are also an assload quieter at idle and part throttle.

Also, 2.25 is not acceptable. The New 4.6 3v's get a 2.5" exhaust with 300hp? why don't we? Also. Mustangs are faster because they are lighter, not the exhaust. :)
 
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