As long as you have the K&N Ru-3530, there's nothing for you to replace. You should be good to go.
'98 CSVT Black
-AEM short-ram intake
-Optimized TB
-Optimized y-pipe
-Magnaflow cat-back
-B&M short-throw shifter
-UD pulleys
-Poly mount
"It's quicker than it was stock!"