yea 450rwhp is the limit, and either will get you there. I would expect it to cost you between 7-10k just depending on how you went about it. The tune is of course EXTREMELY important to get done right.
__________________ 2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
472rwhp/493rwtq -Modification List - Dyno Sheet 2012 Mustang 3.7L M6 (Kona Blue) 2011 Ford Edge Sport (Red Metallic)