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Discussion Starter #1
hey guys im gonna be getting a 7 inch stack here sometime soon and im gonna fab everything up myself but i have just one concern. I'm gonna run 4 inch tubing from the turbo back and up through the bed and im just wondering how im gonna adapt my 4inch tubing into my 7 inch stack?? and help would be great!!
 

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Discussion Starter #2
bump...also where can i buy a 7" stack for a good price?
 

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i see alot of people doing a square tube across the bed and putting the exhaust from the motor to the bottom and then the stacks on the top.
 

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there is an adapter at the bottom of the stack that clamps over the pipe that comes through the bed
 

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go to your local peterbilt or mack or kw or whatever dealer and get some used but good condition stacks. my buddy got his 7" 48" tall stacks for 68 a piece.

kyle
 

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Discussion Starter #6
there is an adapter at the bottom of the stack that clamps over the pipe that comes through the bed
im not buying a kit cuz its 600 bucks and i figure i can custom make it myself including the stack for under 300 so im gonna have to find an adapter on my own...
 

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im not buying a kit cuz its 600 bucks and i figure i can custom make it myself including the stack for under 300 so im gonna have to find an adapter on my own...
depending on where you get the stack i THINK most of them are 4" or 5" at the base!!!:w:
 

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Discussion Starter #8
does anyone know where to even get a 7" stack besides grand rock?? because there stack alone is 300 bucks
 

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Square tubing will probably be the cheapest and easiest way to go
 

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Try chrome depot thats were I could find 6 inch stacks the cheapest.
 
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