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DIY Air Intake

ctkgp what size air filter do you have on your pontiac so i can estimate what size i want based off your pic because i have a gt too.
 


4 inches in diameter and 7 inches long

it fits nicely with a lot of room so you could go bigger if you like
 
hi, thanks for this great diy. im gna do this on the weekend, but i need some help. first can i use 4'' piping or is 3'' only option?
and also what size roof flashing do i need? i know that there are some alumium ones that come with a lock tab fiture?? any advice will be appreciated. thanks i forgot to add that im planninig in using the same method of squeezing pvc in stock rubber hose.
 
its called a street elbow. one side is 3 inches. the fatter side that would take another pipe inside it is 4 inches on the out side. cone filter fits right on it. if you are going to a pipe then you need a filter that will fit a 3 inch pipe. spectra filters fit a 4 inch, but have a ring to reduce it to 3 inches.

the roof flashing you'll want a 3 inch boot to fit the pvc pipe.
 
its called a street elbow. one side is 3 inches. the fatter side that would take another pipe inside it is 4 inches on the out side. cone filter fits right on it. if you are going to a pipe then you need a filter that will fit a 3 inch pipe. spectra filters fit a 4 inch, but have a ring to reduce it to 3 inches.

the roof flashing you'll want a 3 inch boot to fit the pvc pipe.
Thanks for the help. i will be trying this out soon.
 


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