I want to know how u can tell between a O/R H pipe and a OEM H? I bought my car and it has a H on it but i dont know if it is stock or not....it looks like there is O2 sensor adapters on it if that means anything.

 

It'll still have the four cats on it, two a side

 

If its stock it has the four cats?

 

yea.

4 cats: stock
2 smaller cats: aftermarket, catted
no cats: aftermarket, offroad

 

ya , you can't miss em. big dumb *** metal lookin things toward the front of the pipe. oh another good symptom of and OFFROAD h , loud as all hell.

 

Also, I think an offroad pipe will kinda smell slightly like old school muscle, like old school exhaust where you smell like car smell

but yea: 4 cats: stock
2 smaller cats: aftermarket, catted
no cats: aftermarket, offroad

 

on both the v6 and v8 you can see the 4 catalytic converters on the left (side bolted to stock manafolds)

http://www.miracerros.com/mustang/pipes_V6_V8.gif

this is what the CATS look like with a hi-flow aftermarket midpipe

http://www.v6mustangstuff.com/images/05magnaflowx.bmp

offroad H pipe with no cats

http://jdsperformance.com/images/maclthp.jpg

 

Thanks for all the help.....i didnt know because i havent had the car that long...and looked under the car and seen what appeared to be a H pipe LOL....thing is i think the previous owner hollowed out the cats.....how can i tell for sure he did? its hard to get under the car in my yard but them cats are hotter then sh*t when i touch em and the pipes arent as hot.