The 98 is the pre-facelift R170. 2.3l Supercharged i4. Add a smaller pulley and some bigger intake tubes and you've got a faster car than the 3.2 V6. But the pre facelift car has the black plastic cladding on the bottom and looks awfully dated. Also the auto in 98 was a 4 speed without a slapstick.

I don't think they made a R170 for the 2005 model year. That should be a R171 which had a 3.0 V6 or a 3.5. Both are great motors, but very little you can do with them mod wise. Same problem with the 3.2L V6, just throw an intake, tune, and open the exhaust a bit and you're at the top. Suspension is much better in the R171 over the R170, and less top issues.

Sorry about your 2004