Just get slicks. Our problem is a 4.06-1 final drive ratio without enough room to mount serious tires under the fenders.
The low range torque on these cars with a turbo, especially the 2.5L guys is very impressive when combined with that gearing. If the axles hold up you can get an awesome hole-shot with it.
The suspension mods will help with wheel-hop but not wheels spin.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black