As much as I am against getting nitrous as your only mod or like your 3rd mod or whatever....I would say that the most performance that you will be able to get out of $500 would be to get the ZEX kit (55-75hp) and gut the interior. That is as fast as you are going to get for the $ that you have to work with. Now, if you are planning on doing more mods with every paycheck....then I say save your money for a ZC, D16Z6/Y8, or B16 swap.......and smoke the dude in the crown vic (just make sure you've got the right guy in a crown vic
).
__________________
FLINT BLACK 1990 CRX SI
Appearance Mods:
-JDM EF8 CR-X SiR Spoiler
-94/95 Integra GS-R rims
Performance Mods:
-JDM B18C swap
-OBD1 conversion
-Chipped P28 ECU
-Skunk2 Intake Manifold
-DC Sports 4-2-1 Header
-MSD SCI-L ignition
-EXEDY Racing Clutch
Interior Mod
-'95 Integra GS-R Gauge Cluster
Former Motors - RIP:
-JDM B16A #1- Blew up due to over-revving
-JDM B16A #2 - Hydrolocked
Former Cars
'89 CRX Si - "The Bumblebee"
'94 Integra GS-R
'96 Camaro