[Joshs2002Silverado]

also what size piping should i run....and should i run full length exhaust or just dumps after the muffler...

 

[1White04]

Borla XR-1's!! 3 inch single, exit behind the right rear wheel. Or you could go with Magnaflow. As far as dumps go, ive seen people loose low end with dumps after the muffs. But if power is not the deciding factor, use dumps.

 

[1White04]

Come on man. Louder is better!! Plus the XR-1's flow really well and give good power gains.

 

[kevindepot]

Ture duals are fine in Ca. as long as you still have 2 cats. You will lose some low end with duals and you would need an "X" pipe to regain some of that loss.
It is nice to hear that your spending your $$$ on your truck and not a bike, a jet ski, another truck, a car and everything else you have wanted and asked us about.

 

[Joshs2002Silverado]

hey kevin...i wsa wondering, dont our trucks have 3 cats...one off of each header and then it y's into another then the pipes go out to the muffler right....so how would i run true duals...

 

[[email protected]]

Just 2 cats. One on each side then the pipes y-together. Just take out the y to split the sides and run your pipe from there into an x pipe then your mufflers.

 

[Joshs2002Silverado]

sweet thanks....now does anyone know what the truck will sound like with an X-pipe set up...

 

[kevindepot]

2001 is correct. Just make sure that who ever does your work keeps the O2 sensors in. They are just after the cats. In Ca. they check to see if you have working cats installed. But it doesn't matter if you have single or dual exhaust as long as you have cats for each side.

 

[Jellyrolls]

TRUE DUALS !! :head: :head:

 

[Joshs2002Silverado]

so now will running true duals with an Xpipe sound goood..and will it help with performance at all.....

 

[kevindepot]

You will gain some top end. But you will lose some low end. IMO losing any low end at all is bad. Trucks are heavy and need all the low end they can get.

 

[Joshs2002Silverado]

hey kevin...do you know if i would pass smog with true duals...

 

[Jellyrolls]

straight pipe running into echo chamers is what you need :head: :head:

 

[03rado]

it shouls sound really good with an x-pipe, I was debating on getting one for my truck

 

[Joshs2002Silverado]

does anyone know though if my truck with the X- Pipe and true duals set up, will pass california emissions....

 

[kevindepot]

it shouldn't effect emissions as long as you have your cats and O2 sensors hooked up and working. After the O2 sensor, your piping and muffles only provide an outlet for the exhaust and shouldn't change the fuel burning process. The O2 sensor on the other hand sends signals to the pcm that will effect emissions.

 

[Will]

or if you fail... you can try the ole heres a 50 pass it technique...

 

[kevindepot]

or if you fail... you can try the ole heres a 50 pass it technique...

In the "old" days that would work. But with the new dyno check, I don't think that will work unless you can get the Tech to punch in your trucks numbers and put another truck on the mechine that will pass. I don't know anyone that will do that though. The fines are too steep.