What is the diameter of teh rk sport y pipe?

[SLOWBRAEATER]

Ist it 2.5" or 3" y pipe? would there be any benefit to running a 3" y pipe over 2.5? should i just run 2.5" y pipe then 3" exhaust after the y pipe? or 3" y pipe to 3" exhaust?

[SLOWBRAEATER]

Im sure glad i am getting so much help you guys are friendly

[Ttop34]

I think everybody appears so friendly because of the question. The stock Y pipe is 3", get under your car and measure. The stock cat is 3" in and 2 1/4" out. I can't imagine anything aftermarket would be smaller than stock but RK Sport tends to suck so never know.

[SLOWBRAEATER]

I thought the rk sport y pipe was 2.5" thats why i asked the question i want to be certain

[scottblack]

<blockquote>quote:</font><hr>Originally posted by Ttop34:
The stock Y pipe is 3", get under your car and measure. <hr></blockquote>

You couldn't be any more wrong!!! I'll be picking up my car tomorrow, and i have my stock tubulars and Y pipe in the hatch. I'll measure and make sure of this. No way in hell that the stock Y pipe is 3", no freakin way.

I believe the RK is 2.5", not SURE on that yet. I'll look around for you blue.

Scott

[Only4U]

<blockquote>quote:</font><hr>Originally posted by Scott Black:


You couldn't be any more wrong!!! I'll be picking up my car tomorrow, and i have my stock tubulars and Y pipe in the hatch. I'll measure and make sure of this. No way in hell that the stock Y pipe is 3", no freakin way.

I believe the RK is 2.5", not SURE on that yet. I'll look around for you blue.

Scott<hr></blockquote>

it is 3" actually.

[navyblue2000]

the Y-PIPE is NOT 3 inches. the COLLECTOR at the END of the Y is.

[SLOWBRAEATER]

I am 99% sure that scott and navyblue are correct i highly doubt the rk sport y pipe is 3" thanks scott and navyblue i appreciate the help.

[Only4U]

<blockquote>quote:</font><hr>Originally posted by navyblue2000:
the Y-PIPE is NOT 3 inches. the COLLECTOR at the END of the Y is.<hr></blockquote>

whatever the pipe is that connects on to the cat, THAT is 3" i thought that was the Y-pipe? obviously the two pipes coming from the two different exhaust manifolds aren't both 3" that's retarted. but where they meet is 3"

[Ttop34]

I'm not sure what the pipes are before they run into one, something like 2" or so, maybe 2 1/4". The cross section area of a 3" i.d. pipe is 7.07sqare inches. Half of that is about the area of a 2 1/8" i.d. pipe. area = r*pi r = 1/2d

I wouldn't guess they are too much bigger than that but I'm too lazy to crawl under there and look. I was saying that the inside diameter of the big end of the Y pipe is 3". I know this because the flared 3" pipe connected to it bearly fit on the outside.

[thebigwaldo]

I hear the stock ones are double-walled (a pipe inside a pipe), so any measurements you take on the outside will be off by some amount. But it looks like 2" or 2 1/4" i.d. would be about right to go into a single 3"...

[pgriffith]

I thought it was 2.5 inch and then on the actual Y part of the pipe where the two pipes come into one it is 3 inch?

[SLOWBRAEATER]

pgriffith i see you have the rk headers, if you get time please measure the y pipe where the pipeing comes down off each header and also measure it right before the cat thanks i would appreciate it.

[QuicksilverRS]

This is ridiculous...why don't you just call RK and ask them. They'll tell you anything you want to know. Of course, the won't tell you that they put 1/4" 2 bolt flanges on it that aren't strong enough to support the heat. They all warp and you'll end up replacing the flanges or replacing the gasket ever 200miles. If you haven't bought the headers yet, DON'T. I love mine now that I spent a ton of time and money cutting off the existing flanges and welding on the 1/2" 3 bolts. If you want a picture let me know. Otherwise don't waste your money on the headers...they are sub-standard and a half.

Ryan

[SLOWBRAEATER]

Actually i knew about the rk sport headers way before you ever joined this board, I just didnt want to call them and end of waiting an hour on the phone while bill gets mike then mike asks tommy to ask jess to see if he can find robby to ask bob to find jim to ask walt how big it is, I hate rk sport they have shi*** customer service and i figured i would find out so much quicker on this board.