E-bay LT headers

[lechez71]

ive been told to do 3"

[kerrige]

3in duals is real big unless you have some big power it really depends on your mufflers and if your running cats as well
no cats and a straight thru flow mufflers you would be better off going a little smaller like 2 3/4.
Lots of 300+hp guys out there running a single 3in
Also depends on if you are talking about true duals.

[lechez71]

i guess i was told 3" because when the local muffler shop bends the pipe they do not stay perfectly round, as to a mandrel bent pipe. so it loses some flow.

[pl4yboy]

i guess i was told 3" because when the local muffler shop bends the pipe they do not stay perfectly round, as to a mandrel bent pipe. so it loses some flow.

Maybe 3" for a single. 2.75 duals will be plenty.

[rel3rd]

3in duals is real big unless you have some big power it really depends on your mufflers and if your running cats as well
no cats and a straight thru flow mufflers you would be better off going a little smaller like 2 3/4.
Lots of 300+hp guys out there running a single 3in
Also depends on if you are talking about true duals.

Plenty of F bodies with well over 400+rwhp with 3" Y-piped exhaust as well. Definitely no need for a 3" true dual setup on anything anywhere near stock...especially since these headers only have (dial caliper measured) 1-5/8" primaries and 2-1/2" collector pipes anyway....regardless of what they advertise them as. I've personally made over 500rwhp through 1-5/8" longtubes and 2.5" dual exhaust on another project, and know several others who've done the same.

BTW, I'm the one who posted the huge thread (actually over a year ago) about these same headers on PT.net complete with tons of install pictures, tips, ideas, etc...and yes, I am still happy with them, no problems to date, no complaints, and still the best value per dollar for any longtube header/y-pipe setup out there, bar none.

http://performancetrucks.net/forums/...d.php?t=450962

UPDATE!!!
FYI> It's been confirmed that these actually are 1-3/4" primaries as advertised. I measured them internally, and got 1-5/8", but externally, they measure 1-3/4". A guy on performancetrucks.net measured his high dollar Stainless Works 1-3/4" headers and they measure the exact same circumference as these Ebay headers do...5.5" around...