So I Do or Do Not need the ORY pipe? This is a 2006 truck with only 3600 miles on it, so things should come apart without too much trouble. ( I just jinxed myself! ) And what about the 02 sensor extension?

 

Go with longtubes . The stock manifolds on our trucks actually flow pretty well.

 

I hear the same thing about the shorties also. I guess I'm a jackass then because I bought JBA shorties. They seemed to give about 15-20 more lbs. of low end torque but not sure. How much more does the LT's give?

 

if you get the l/t's, you need to either buy an ory, or have an intermediate pipe custom fabbed.

 

You shouldn't need any extenshions for the o2's, and for rears if you get sims you will be fine. If you keep the factory y, you will need to get it fitted to the new long tubes. I would just get the off road y and o2 sims,but thats just me..

 

Go for LT's, and yes they will fit an 06. Get a custom tune to delete the rear O2 sensors, a custom made Y or the Offroad one, really up to you.

 

A set of good quality short headers (like JBA) will make about 12 - 15 HP, at the tires, and increase your gas mileage by about .75 - 1 mpg. A good set of long tube will make about 25 hp, and give your about the same added mpg. Overall, about 10+ hp difference, on the mild truck. But, if you intend on installing even more mods, the horsepower difference will increase (mods tend to compliment each other)

There are several things to think about when making the choice between short tube, (mid tube) and long tube headers:

1. Is emissions compliance a concern?
2. Is easy of installation a concern, and are "Y" pipes available? My JBAs took about 3 hours to install, my mid-length took about 8 hours and a lot of welding.
3. Can the headers come coated? Ceramic coated headers will make more power than non-coated, but do cost more. These keep the heat in the exhaust and keep down the under hood temp.
4. What tube diameters are available? Bigger is not better.
5. Will the cats need to be moved? This can be a problem, if the O2 sensors are not at the correct temperature.

On my first Silverado, 5.3, I choose JBA short headers. On the dyno (with catback exhaust and an airaid CAI), an otherwise stock 5.3 gained 15 hp and 15 lb of torque. Overall, this setup gained 2 mpg on the freeway.

On my 6.0, I choose "The Other Guys" mid length (out of business now), because they are CARB legal and I did not need to move the cats. I could not find any long tubes, at that time, that were legal.

Either choice will yield extra power. Add a good pcm tune and really wake up the combination!

 

I put on a set of Gibson shorties and found a SLIGHT low end improvement pulling a camper same with the mileage. This with an otherwise stock 5.3. Based on long ago hot rodding experience with long tubes, I would say go long.

 

I thinks that's too much power at the wheels. It'll probably make 12-15 at the crank.

 

go with the LT's. im going to do that, ory pipe, delete the 02's with a custom tune. still stuck on to make it true dual or not. but yea go with the lt's