please explain the difference....help

[fluffyrunnells]

i understand the difference when you go from stock mid pipe to a off road x....rwhp gain, and loud. now what if you go with an x pipe with high flow cats..?? tiny hp gain..??? and louder....??


i think i have asked before but never really got an answer...


any help

 

[Kilgore Trout]

When you lower back pressure you move the powerband up in the RPM range.

 

[fluffyrunnells]

got that part...


just weird question, not looking for anyone to tell me to buy or not to buy. just i know the difference from stock to o/r, have experienced it first hand. just looking to see if the x or h with high flows is in the middle, not even close or not far...........

 

[TrueBlue03]

i just switched from a MAC offroad H to an SLP catted X ...much quieter (especially because of the packs) but the car actually feels a tiny bit faster with some back pressure

the SLP Catted X is noticeably louder than the stock H also.

and now i'm finally able to smash the pedal to the floor and have it not sound like a drive by shooting.

 

[merc123]

The difference:

No Cats = Less backpressure, louder, more HP/Less torque

With Cats = More backpressure, quiter, less HP/more torque

 

[ShapeShifter]

i just switched from a MAC offroad H to an SLP catted X ...much quieter (especially because of the packs) but the car actually feels a tiny bit faster with some back pressure

the SLP Catted X is noticeably louder than the stock H also.

and now i'm finally able to smash the pedal to the floor and have it not sound like a drive by shooting.

LOL,thats what mine use to sound when i had an O/R H and SLP LoudMouths!!
"hit the deck",bwhahaha!!!

 

[BurningRubber]

I went from stock H with no mufflers to UPR o/r X with stock mufflers.

Stock, grunt down low, didnt open up a can of whoop ass up top or anything, but felt good.

UPR o/r X and stock mufflers. Still allright down low for a 4.6, little less... but get up in the RPM's and it opens right up, it feels like it pulls a bit more than the stock h and no mufflers.

 

[ADRENLN]

no cats will make maybe 2 over the high flow catted pipe.

i also use the slp catted x pipe and like it better then the bassani o/r x i used to have.

 

[CobraRed_96_GT]

SLP catted is what i have, preffer it over most; hangs a bit low tho

 

[jegg]

i just switched from a MAC offroad H to an SLP catted X ...much quieter (especially because of the packs) but the car actually feels a tiny bit faster with some back pressure

the SLP Catted X is noticeably louder than the stock H also.

and now i'm finally able to smash the pedal to the floor and have it not sound like a drive by shooting.

Have you had to smog test your car yet with the catted SLP x pipe? I am wondering because i am considering buying one but was scared that i would not pass smog even if it was catted.

 

[04GTMustang]

i passsed emissions with mine last weekend but i dont know if they did a sniffer test on it or not but i passed thats all that matters.

 

[streethorse]

i understand the difference when you go from stock mid pipe to a off road x....rwhp gain, and loud. now what if you go with an x pipe with high flow cats..?? tiny hp gain..??? and louder....??


i think i have asked before but never really got an answer...


any help

Even another scenario that I considered ( not to hijack ) but what about an
x pipe with the stock cats still in place. anyone try that........

 

[bakos24]

i just switched from a MAC offroad H to an SLP catted X ...much quieter (especially because of the packs) but the car actually feels a tiny bit faster with some back pressure

the SLP Catted X is noticeably louder than the stock H also.

and now i'm finally able to smash the pedal to the floor and have it not sound like a drive by shooting.

So by replacing your o/r to a catted stopped the machine gun sound? I think I will have to do that. Mine sounds like that with my LMIIs and UPR X when I stomp on it, other than that sounds great.

 

[TrueBlue03]

yep as soon as you throw some cats on there, the machine gun/backfiring blasts stop and all you hear is the tone


but i miss having the loudest stang on the road

 

[TrueBlue03]

Even another scenario that I considered ( not to hijack ) but what about an
x pipe with the stock cats still in place. anyone try that........

nah i wouldnt do that. that would just be too much work and probably end up costing you just as much as buying an aftermarket catted x....and still having the crappy stock cats cloggin up the exhaust flow.