22-03-2013, 02:51 PM 
	
	
	
		Jonny's gt20 spools almost as quick as a gt15 and you womt get the stupid emps that you will with a stock turbo. People have looked into machining out a gt15 hotside and theres not much to play with, certainly not enough to be worth the cost of doing it.
	
	
	
	

 
 

 
 
