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					Originally Posted by  truegearhead
					 
				 
				Thanks for reaching out over IM.  As you know I put a 2.7l in my 2.5l car.   You need to use the 2.7 intake manifold, and the 2.5l crossover and throttle body and the 2.5l wiring harness.  The vacuum port for the second cross over can just be blocked.  I used the factory 2.5l ecu.  It dyno’ed at more power to the wheels then a 2.7 is supposed to make at the crank and ran great.  If you need anymore help let me know, happy to help 
 
Edit: I also used fuel rail and return system from the 2.5 
			
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Did you only use the crossover with the throttle body or both crossovers?