Quote:
	
	
		| 
					Originally Posted by turboapex  What things can you do to get as much power as you can externally to the LS-9 ? | 
	
 pulley swap and re-tune gets you to 700+ hp. Beyond that, head porting and a cam swap gets you another 50-60 hp or so. Charley recently did the pulley and tuning on his stock LS9 69 Camaro and is very happy with the difference, very noticeable.