|  11-19-2008, 05:47 PM | #5 | 
	| Rotary Fanatic 
				 
				Join Date: Feb 2008 Location: Tucson, Arizona 
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				Rep Power: 18      | 
			
			Don't quote me on this, but im pretty sure the ports dont line up exactly right when putting s4 manifolds on an S5 and vice versa. And I know the timing is different on each motor. Keep the motor S5 and use the S5 ecu. I wouldn't worry about the gauge cluster until you get the car running. You can re-pin the gauge cluster to work. 
 As far as what else you will need I think the pressure sensor and TPS if the motor didnt come with all the electronics and accessories on it already.
 
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