hey guys, im new to the forums. my name is jeff and i have a 91 lx 2.3 mustang. im going to redo the exhuast and i was looking for a header instead of the manifold. i couldnt find a shorty header but would a long tube header from pacesetter for the 70's 2.3 mustang II's? im jsut curious if it will like... scrape on the ground or something stupid like that. it just looks pretty long thats all. please help me out with this. thanks.
-jeff
-91 LX 2.3L mustang

 

The primary tubes are longer, but overall it's not any taller than the shorty header/manifold and downpipe. If you really want a shorty header, search for '94+ 2.3L Rangers, they all should have one. The long tube header will extend farther back than stock, meaning you will have to relocate the cat (or get rid of it altogether). Also, I'm not sure which connection is missing on the pacesetter, the O2 sensor bung or the EGR nipple, but no current aftermarket header has both of them.

 

um... what does either of them do? lol i know about the smog crap, but hte egr? what if i left all of it un hooked? what would happen? anything? thanks
-jeff
-91 2.3 lx

 

O2 sensor monitors the fuel burn. It sends feedback to the computer to adjust the fuel mixture (lean or rich). The EGR is also controlled by the computer to feed exhaust gases back into the intake for emissions and fuel efficiency. Disconnect the O2 and you get a CEL and iffy fuel mix (computer doesn't know what it's doing, so it just guesses). Remove the EGR and your engine will run leaner (more good air w/ O2 instead of exhaust gases), will knock and ping more.