What?
I had ZERO problems keeping both stock fans using the stock MSP exhaust manifold.Intake issue is solved using a reducer coupler to hook to an injen intake.
Now the coolent line's on the other hand, was a b**** and I couldn't bend them as everyone was saying is possible so,I had to cut and rejoin some of them.
Also,relocating the wastegate further up on the housing and making a bracket like Wicked did for the wastegate to work.
Also,73mango to save you a little bit of a headache if your using the stock MSP oil line.You will have to put this oil restrictor in line from ATP:
http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=ATP-OIL-021&Category_Code=GTBB
And have a new line made unless,you can find a female style restrictor.The stock MSP line supply's to much oil to the turbo allowing oil past the oil seal's,under WOT.That and the coolent lines are the only problem's that I'm having/Had with the GT28RS....
Maybe, your Inlet housing isn't clocked/positioned right?
Don't get me wrong, spal fan's are very nice piece's but,you do not NEED them to install the RS....