offroad X pipe or flowmaster catback?

[Allforspeed]

wondering which one is worth more HP on a bolt on and 100 shot 5.0? i have to choose one or the other right now and wondering which one i should keep on my car

i will either run the stock H pipe with the flowmaster catback or my offroad X pipe with the stock mufflers and catback.
i also have a stainless BBK 2.5 inch H pipe,off road to choose from if someone thinks that will be quieter and/or more powerful than the X though i've heard X and H pipes make the same power on normal street cars,

thanks!

 

[85_SS_302_Coupe]

Go with the X and stock muffs, and run dumps with the mufflers if you don't have to worry about emissions. The cats on the stock H pipe are the most restrictive part of the stock exhaust system, so they need to go first.

 

[95COBRA241]

IMO the stock catted H-pipe is more of a restriction than the stock muffler. Therefore the o/r x pipe and stock mufflers would yield a better HP gain. But the flow cat-back would sound nicer.

 

[Mattsmustang]

trash the stock h-pipe especially if it has older cats on it you'll loose some weight and gain power.

 

[IntenseBlue]

I vote Flowmaster c/b, but the Xpipe will probably pick up a few more horses right now.

 

[jackchan]

if you have emmisions test where you live, then go with cat back!

if you dont have emmisions then I say gut your stock H-pipe.....and buy flowmaster cat back!

if you dont have emmisions and have access to a welder.....then make your self a home made off road H-pipe. by cutting out each cat one at a time and adding pieces of pipe back in there place. when you cut the drivers side and passenger side fronts you will need to weld your self a brace across from the other side to help hold it still while you weld in the new piece
........and buy flowmaster cat back!

 

[Allforspeed]

cool, thats what i'm running right now and i just swap the stock H pipe back on when i have to smog, but if i use the flowmaster with either the X or H pipe its so fu**ing loud that i get pulled over constantly and it sets off my neighbors car alarm every morning, i'll Gtech before and then gtech again with the stock H pipe and the flowmaster and post back here but i just wanted some opinions of people more stang wise than me

thanks

BTW: for anyone searching this the flowtech X pipe sounds so much sweeter than my Mac of BBK H pipe ever did and its hard to tell but i think i gained a bit of mid-range

 

[jackchan]

glad it worked out for ya but I've never had anything good happen with flowtech! Every part I have ever tried to install that was flowtech was a major PITA to get in. Once I was installing a set of long tubes from flowtech.....and the crappin ox sensor holes were never even put in.....it was a threaded couplin with NO hole in the header! From that day on I have refused to buy anything flowtech makes.
some people have good luck with em I guess, and maybe they have improved........but I just do not care for em!
Jack

 

[tunedin302]

I say get the mid pipe and weld in a set of aftermarket mufflers if you can't swing a cat back. The stock H is more restrictive than the stock mufflers.