um... who cares????

with my 02 screw i had no muffler, i was my neighbors alarm clock basically. i would wake her up driving off to school and she would know it was time to get up and get ready.

so really you could be doing everyone a favor in your neighborhood by helping them get ready for work and/or school

 

Well according to Troyer, they state 1 5/8".
http://www.troyerperformance.com/cgi...no=122-622100s

"These headers feature laser-cut flanges & mandrel bends, and are made of T304 Stainless Steel (including hardware!), use 1 5/8" tubes, Magnaflow high-flow cats, and already have both the upstream AND downstream O2 sensor bungs welded in! So all you need to do is to simply screw in all of your factory O2 sensors once you install this system, and it is very easy to install. Your OBD-II system will work as designed from the factory, no more having to run illegally by having your tuner turn off the rear O2 sensors, etc."

 

#122-842200S shown here
http://www.afabcorp.com/AFCO_Dynatec...Code=ford-f150



Complete System Kit
Includes everything needed for simple bolt-on installation Header Kit Only
Will typically require fabrication of mid-pipe and/or cat-back
Mandrel bent headers with 3/8" flanges and hi-flow collectors
"Flexible" donut-style gasket connectors
Two hi-flow catalytic converters

somehow i believe the company that manufactures them. i would think they would know what size their tubes were. check the site

 

Um we arnt talking about "flange" size at all. Were talking about the individual tube size, which is 1 3/4 (so dynatech says) or 1 5/8 (so troyer says)

Well this is a WTF. I believe troyer and all, but dynatech themselves says 1 3/4.

 

really, no kidding. thats what im talking about also. i tried to copy the pic with the part that said 1 3/4" primaries from the website but that part didnt come out. (hence why i said they knew what size their tubes where)

i left the "complete system includes " so people know how cool and inclusive it is.

i was agreeing with you the first time. that was my fault, it wasnt clear.

 

Oh LOL ok my bad.

I talked to troyer and he emailed this back to me

"I followed up with Dynatech as their catalog also said the headers for the 04 & up F150's are 1 5/8 verses 1 3/4 on their website. I have confirmed with them that they are 1 5/8. Their website is incorrect. "

So DarrenWS6 is correct! I am wrong as the website is incorrect.

 

Dynatech's website product lister must be new to the trade

 

apparently, so Pacesetter has 1 3/4" tubes to 3" collector, and Dynatech and ARH have 1 5/8" tubes with 2.5" collector.

 

well thats funny. props to troyer. so with our trucks, which would be better for performance? i guess dynas would fit better too.

 

i have had my hraders on for a while now and noticed that aparently when the motor moves the headers hit my frame anybody have this issue if so how did you fix it?:o

 

i was thinking on mine that the pass side was hitting the bottom of the body. but yeah i have the same deal so im curious also.