haha ya but wat i have linked is that want i want to get rid of the restrictive y pipe

 

Yes, it's what you want if you are doing the Y for the 00-01 models. Some Y-pipes are very smashed and restricted where they meet in the 3" pipe and some not so much like mine. The 99 and older I beleive are worse. I just did mine and bumped up to 3" with the magnaflow Y-pipe and Cat and O2s, really didn't notice much difference as my old cat seemed to be working fine. I already had a hi-flow 3" muffler installed and that made quite a difference when it was done. I think some will notice more improvement depending on how smashed the inlet pipes are. We already have dual 2.5" to 3" at the cat, think the older ones are dual 2" inlet, so would make more difference on those models.

Our cat is 3" so you want dual 2.5in/3out.

Here's the y-pipe I replaced, not as restricted as I was expecting




Here's the new setup

 

http://www.ebay.com/itm/MAGNAFLOW-SS...item563a258ee5 (they have different sizes too why pay twice as much from the magnaflow website? Even retail stores are cheaper than "suggested retail " you'll find there...

Fyi Acrording the the articles I recently read unless your producing like 450hp+ the difference between 2" and 2.5 at the head pipes isnt noticeable....dual 2" pipes can move a lot of air as long as they are smooth without restrictions. things like the y, cat and muffler are still going to be the bigger restrictions as far as airflow.

beeker, those head/down pipes you are using are not mandrel bent, they appear to be restricted down to 2" at the bends anyway and this creates turbulence in the flow that way from what I've read...I would suspect 2.5" pipe with bends like that will flow just as restrictively if not more than true 2" all the way into the y pipe...plus I read that if you go too big on those head pipes with shorty headers the scavenging effect is diminished.
I'm no expert but it makes sense.

 

what kinda of difference am i gonna have if i just replace the y pipe alone?

 

Y-pipe is pretty much the worst restriction in the system. Just getting rid of that will give you a noticeable boost in power.

 

cool how much u think a muffler shop would charge to have one put on

 

If you have some tools, and a place to play, you could prolly do it yourself in your driveway. Trouble with taking it to a shop would be.... you are going to have to have a cat as well. Most shops won't just remove the cat, without putting another in there. Federal law,and all that......

If there is a custom exhaust shop around, or, simply a shop with a pipe bender, you could pick up a universal cat, single in/single out, in the right diameter, and have the shop make you up a y...... If they are good, will work just as well. Or, you could buy one of the aftermarket "off road" y-pipes, (right around 130 or so....) a universal cat, (100 bucks or so) and splice the cat into the O/R pipe.

Yet another alternative would be just to get a 'stock replacement' pipe from magnaflow, that already has the cat, and flows a HELL of a lot better than stock.... they can be had for 2 to 3 hundred bucks.

No matter which way you go, you will either have to do the install yourself, or, put up with the additional expense of having someone else do it.

 

i got a cat on, i was just gonna cut the y pipe off and have the new one put on, isnt that what i should do anyways

 

If your sure your cats ok yeah.. If you got the extra 100 bucks put a high flow cat on there especially if you have any reason to believe your may be partially plugged.....
Technically unless the shop has reason to believe the cat is bad it illegal for them to even replace it... its one of those laws with noone to really inforce it though..

 

if i do it myself is it easier to just take the exhaust off from the header tubes and drop the exhaust pipe? the pipe that i linked can i just cut off the old one and put that one on or do i have to do something like beeker did.