My gains if...?

[Red03Mustang]

I currently have a K&N filter, and a set of MagnaFlow mufflers. The rest of the exhaust is stock, and so is the rest of the intake.

I am thinking about adding a K&N CAI, since most people on here are saying they are gaining 10+ rwhp from it. To me, that's great, and seems higher than other CAI's. Plus, it would be a relatively cheap way to get 10HP.

What I am wonderin is... if I add an X-pipe, and use my magnaflows, plus the K&N CAI, what gains would I be looking at? I'm seeing some people on here say that an SLP exhaust with X-Pipe is giving them a solid 20rwhp, at least. That, plus the K&N would add up to 30rwhp, am I correct?

I don't know what "catted" x-pipe means, either. Could someone inform me about that, and its differences from a regular x-pipe?

For true HP gains, should I get rid of the Magnaflows and go with SLP exhaust equipment? It seems from what I've been reading that SLP stuff flows better, but I don't know if that is true or not. Or, will my current Magnaflow mufflers be great for what I'm doing?

I guess if someone could give me an exhaust setup that would give me the most HP, all other factors aside (except for passing emissions), that would be great. In other words, what brands give me the most RWHP, and what is a complete exhaust setup that I should look into?

Sorry that I'm kind of jumping around here, but all these things are going through my head.

 

[wms004]

I currently have a K&N filter, and a set of MagnaFlow mufflers. The rest of the exhaust is stock, and so is the rest of the intake.

I am thinking about adding a K&N CAI, since most people on here are saying they are gaining 10+ rwhp from it. To me, that's great, and seems higher than other CAI's. Plus, it would be a relatively cheap way to get 10HP.

What I am wonderin is... if I add an X-pipe, and use my magnaflows, plus the K&N CAI, what gains would I be looking at? I'm seeing some people on here say that an SLP exhaust with X-Pipe is giving them a solid 20rwhp, at least. That, plus the K&N would add up to 30rwhp, am I correct?

I don't know what "catted" x-pipe means, either. Could someone inform me about that, and its differences from a regular x-pipe?

For true HP gains, should I get rid of the Magnaflows and go with SLP exhaust equipment? It seems from what I've been reading that SLP stuff flows better, but I don't know if that is true or not. Or, will my current Magnaflow mufflers be great for what I'm doing?

I guess if someone could give me an exhaust setup that would give me the most HP, all other factors aside (except for passing emissions), that would be great. In other words, what brands give me the most RWHP, and what is a complete exhaust setup that I should look into?

Sorry that I'm kind of jumping around here, but all these things are going through my head.

I wouldn't waste money on buying a FIPK when you already have a K&N filter. Just trim the silencer or take it off. Then get yourself a magnaflow catted X. High quality cats that seem to last longer than some of the others. Call www.fulllineexhaust.com and tell them stangnet sent you. They should give you a price of 380 shipped or less. That will net you 7+RWHP. Whoever told you FIPK = 10RWHP they are wrong or they got really lucky on their application.

-wade

 

[twogts4us]

It's true - the GEN 2 version of the K&N FIPK, whether the guys have been lucky or not, are true, solid, real gains. There was one guy out here, just sharing is story, with a dyno sheet, before and after to prove the gain. (It was around 8 RWHP if I remember correctly). The OEM accordian rubber inlet hose is a piece of crap, IMO. Anything is better than the OEM one. Densecharger, MAC, C&L, K&N....
You can't start stacking the reported HP gains however. The parts react differently in different combos.

 

[Go HoTO!]

Yeah,he pretty much said it. There are two schools of thought on CAI's, they are either good or do virtually nothing. They will cause a slight lean condition which is where some of the HP gains come from. The more HP your car is putting out, the more you will benefit from a CAI (Cold Air Induction). It's proven on late model cobra's to see over 20 rwhp from one. They also look nice.

If u want it, get it. I think on a near stock car, the gains are more like 7 - 8 hp.

A catted X Pipe, BTW, means that you keep the cat. converters. An off road X pipe (referred to as an O/R X) does not have cats. You will get even more hp from an OR X but it won't pass smog. Some companies like SLP make a mid pipe that you can swap out in seconds for cats or no cats. Great for the track or just passing smog, but pricy.

SLP exhausts flow about the best and you will see the most hp improvement with them. They are loud and sound like an older muscle car....not everyone's taste. Exhaust is very personal. With an SLP CatBack Loudmouth Exhaust, you will get 11 rwhp on a car with a supercharger and about 7 with a normal GT. The full SLP (catback, catted X, and long tube headers) will get 30 rwhp on a 96-98 GT and even a few more on a 99+ GT. The big question is how much of this is comming from the headers. I have never seen a dyno with just the SLP catted X and catback.

I have the Loudmouth and am adding the catted X Pipe soon.

 

[Red03Mustang]

Thanks! Now, if... ;-)

Thanks for the responses. Sounds like I might leave my Magnaflows on there and do a catted x-pipe. Anyone recommend any particular brand?

If I left the Magnaflows, and add say, an SLP catted x-pipe, and did long-tube headers, what would be a good estimated rwhp gain? +20?

Also, what would you recommend as far as brands go? Staying within the same brand, or is mix & match fine?

TIA!