Quik

dont cut them off. just buy a new pipe for 125 or around that. one it will be 2.5"in diameter instead of 2.24 and a good pipe will have smoother bends. and besides you have 4 cats not just 2

JamieH

so what is the purpose of the h-pipe ? <IMG src=smileys/smiley6.gif border="0">

Quik

in a nut shell. they balance out the gases. and add sound and power.. you have one stock ubt it has 4 cats on it

JamieH

so if i get a new hpipe...does it like just bypass the converters or what ?...lol..sorry for being a pain...also...do ya have any idea why the idle would rev up &amp; down the 1st 20 seconds or so ?....also,what is the air silencer do and should i take it off ?

T5superduty

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You arnt being a pain.. that is what these forums are made for... too help ya out</P>

JamieH

Thanks T5

Quik

a offroad pipe removes the cats totally. it is whole new pipe that goes from the headers to the mufflers.

you idling is probably a vaccum leak. the fords are know for this. since they have hard brittel lines. that over years then to break. and yes remove your silencer for now. it will be worht the extra gain you get from it

JamieH

ok...now i know what your talking about finally lol.....now ....can i get one at auto zone or will my muffler shop have one ?...what kind do i need ?

Quik

no you can pick on up from summit. the cheaper ones are made by mac, and pacesetter. i have a bbk. there are others out there. the mac is like 115[roft] and the bbk is like150

JamieH

one last question ... where is the air silencer and what is required to take it off ?...thanks ohsoquik...you been REAL helpful !!