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Hey peeps,

Ive installed my new 2835 Pro S into my R33 RB25 along with a plazmaman plenum, I did a dummy fitment of the intake pipework last night and have found that the 3" intake pipe that comes with the Pro s kit is not going to mate up with my custom airbox or my BOV return pipe so I will have to get one fabricated with a bit of extra length and the ports for the BOV moved around a few degrees on the pipe.

Because I am already going to have to go through the hassle of getting pipework made up should I just get a 4" (100mm) intake pipe made so that its the same size as the compressor housing, then just run a reducer to the AFM or just keep it at 3"?(Actually the HKS pipe is 3.15" or 80mm)

Are there any downsides to running a large diameter pipe.

I have searched but it didnt really cover my particular case as such.

Thanks

bigger the better ! Hows things david? are you ditching the hypergear?? let me know how u go!!! i have a new stock highflow it runs pretty good man!! check out some of my drift videos!

:)

your AFM is still 3" so may as well just get a 3" pipe made up (Cheaper at least)

I just bought two 90 degree 1" hoses for my BOV return to get it to fit on the HKS Supplied intake pipe, had to cut the BOV return barb on the pipe down a bit but. I have a front facing plenum and my BOV located on the hot side of the intercooler, sorta right in front of and above the turbo. But without seeing your setup not sure if what I've done would work on your car

Hey Geraus! Long time no speak mate. Yeah time to upgrade, going 2835 and plazmaman plenum. The hypergear has been good but I want more power and I couldn't pass up the pro s when I found it.

Cal my bov is going on the cold side under the TB and then has a 38mm pipe running in front of the engine to plumb back into the intake. I'll post up some pics when the mrs gets off the computer.

I just went and fitted up the hotside pipe and I think 4" will be pushing it any way, not much room to play with. I was running a apexi super suction kit before and the hard pipe was pretty much the same shape as the standard soft pipe and my airbox was made to suit.

What I might be able to do is get a 80mm pipe made the same as the hks item but then add around 50mm of straight then a 30deg bend and it will mate up sweet with the afm then.

Dunno how well it will work I'll have to make up something out of PVC to see if it fits, anyone have any other opinions??

my 2835 came with the 3" intake with slots... so I used 3" and it all fitted the AFM using the HKS hardpipe all the way to the airbox.. using a silicon joiner here and there... may as well just use a reducer from the turbo intake, you still have to accommodate the afm anyways....

The problem I have is that my AFM now sits a lot further in towards the guard than it would in it's stock position, I think a little higher too.

I moved it when I built my airbox many moons ago so even with joiners the hks pipe won't reach, a PITA really but I don't won't to have to redesign an entire airbox just to fit an intake pipe. Not to mention the BOV port problem so I think the whole turbo side will have to be custom.

I used an arc airbox and it all bolts up in the stock airbox location and the hks hardpipe fits perfectly with afm in stock place... it made things nice and neat...

sounds like you dont have a choice but redo a new air filter location of sorts...

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