Kenne Bell has listed on their website a 2.8 mammoth kit for the 3 valve gt. The interesting thing is that it states "100% stock spec engine" right under it. Forgive me Iam wrong but wouldn't the engine internals need upgraded to put out this kind of power? I have been researchng building a s197 car. Iam looking for 650+ rwhp. I rode in a friends 03 cobra with the whipple on it making 620 rwhp hp on pump gas and I cant stop thinking about it. I can get a deal on prochargers, would that be a better option. Thanks