Those with Magnaflow's Exhaust System (Part #15072)

[macatron]

Originally Posted by mattlqx

I have the catback Magnaflow as well. I think I put it on at the beginning of the year. I'm very happy with it. Just enough sound to hear with a pleasant deepish tone. If you want something loud to turn heads, this isn't for you. I was most pleased with the extra few HP gained. The car is definitely faster without the stocker exhaust. Install was pretty easy too, you just have to cut the factory exhaust in one place. Helllllo angle grinder.

Awesome!! Thanks for posting up! I'm definitely glad to hear that you're really enjoying your Magnaflow cat back too. :-) I was kinda hoping that this thread would be the place where everyone could post up opinions, photos or videos of it installed on their rides. As for the tone, it definitely sounds like it's absolutely perfect for me because that's all I'm looking for. :-D

[jdubhack]

Would removing the cat and replacing with 2.5" produce further hp gains when coupled with the rest of the system? Obviously for those in states that do not have yearly inspections.

[dyn085]

Originally Posted by jdubhack

Would removing the cat and replacing with 2.5" produce further hp gains when coupled with the rest of the system? Obviously for those in states that do not have yearly inspections.

In short, yes.

[jdubhack]

Originally Posted by dyn085

In short, yes.

Any foreseeable problems with this set up?

[dyn085]

I think I misread your post if you are talking about coupling the Magnaflow kit components with 2.5" piping. Those components may not work with that size piping, but I'm not 100%. Going with 2.5" and removing the cat, would require a full custom build, or long-tube headers and one of the available 2.5" setups.

The only real issue is the possibility of beginning to run a lean AFR, though there isn't a lot of data showing of just how lean the system will/can get. Focusboy is running the long-tube headers and his dyno did show a slightly lean condition, though still within tolerances. Obviously, waiting for a tune is always the best option.

[Joey D]

If you want a 2.5" exhaust then I'd buy a kit that already was made with 2.5" piping. I honestly don't really see much a difference .25" would really make though since our cars really aren't putting down a ton of power to begin with.

[macatron]

Hey Joey D, are you still planning on posting up a video of what your exhaust sounds like from the inside of your car (while driving)? I'm REALLY digging this exhaust, and I'd LOVE to hear what the interior tone was like. Thanks again for everything bro.

[Sonic_HedgeHog]

Originally Posted by Joey D

If you want a 2.5" exhaust then I'd buy a kit that already was made with 2.5" piping. I honestly don't really see much a difference .25" would really make though since our cars really aren't putting down a ton of power to begin with.

It's the ability to flow, for future head room for other mods. Same goes for picking out parts for custom systems, if they won't flow enough CFM's you'll hinder your ability to make power.

[Joey D]

Originally Posted by macatron

Hey Joey D, are you still planning on posting up a video of what your exhaust sounds like from the inside of your car (while driving)? I'm REALLY digging this exhaust, and I'd LOVE to hear what the interior tone was like. Thanks again for everything bro.

Sorry mate, I just got my MacBook back today, but as promised here it is. You can see it's not that loud and it's even drowned out by the road noise off a set of summer tires and the Steeda CAI. I guess it's also worth noting it was hot that day, like 97 or something and I had the A/C on.

It is slowly getting louder and deeper though. I'll probably wait another 4 or 5 days and then do another sound clip.

YouTube Video

It's being screwy with the embedding but here's the link if it doesn't work: http://www.youtube.com/watch?v=GIb7rEyDmHo

Originally Posted by Sonic_HedgeHog

It's the ability to flow, for future head room for other mods. Same goes for picking out parts for custom systems, if they won't flow enough CFM's you'll hinder your ability to make power.

Ya but it's not like the Focus is some 300hp car. I mean ya, if the kit you want is a 2.5" there's nothing wrong with it, I just don't see any noticeable power difference between the two. I mean I might have gotten 8 or 9 hp at the most from the exhaust (probably even less) and I know the Steeda CAI didn't really give big gains either. With a 2.5" exhaust maybe an additional hp or two?

[Seriously Focused]

Check out the FORD SVT site. They have a nice catback OR an "axle back" system that's quite nice and it's from Ford. It has a pretty nice chrome dual tip on it as well.

I believe the axle back system is about $399 but you can probably get it cheaper online or a "friendly" dealer.