Ive been trying to modify my car (Black 97 VR4) as cheaply as possible. So far I have installed an K&N FIPK as well as an Autometer boost pod and 30 psi guage and an HKS [email protected] I am Gutting out my cat and precats this weekend, and plan on using my christmas bonus to add a stillen Downpipe and custom cat back. That should get me to bpu level without much cash at all. What other mods can I do to get large performance gains without the huge expense of a turbo upgrade??