lxstang5_0

Which adds more horsepower to a fully stock 5.0 engine?

MattCA

long but they wont pass smog and i think they are illegal??? but i hear shortys are 5-8 and long is like 10-15.

DR8907

Long tubes are going to give you more power - not sure about if they are legal or not but check your state laws - anyway, I have short tubes cause they are alot eaiser to install and there isnt that much of a power difference. Longs cost more too.

Pure5.0

LT will give more power than Short. But only by a few horses. You really wont see a major difference between the two until you have a mildly moded engine or higher.

Also LT are illegal and they arent emmissions legal

Quik

LTs can be legal depending on wehre you live

LTs dont really make that much more power then shorties. they make more down low but up top they fade off compared to the shorites

personally no need for the LTs untill your above 400 hp NA

DR8907

J/W why would long tubes be illegal?

Pure5.0

Sure wish they were legal where I live..........

MattCA

someone mentioned in another forum that they dont let the exhaust warm up enough to where the cats need to be to work proporly therefore raising emmissions which i think the main one would be the nox.

stanglx2002

if you get the LT's you will have to change the h pipe anyways and they do sell a catted h pipe and the cats will work