...would car gain for the following mods done at same time:

1. Apexi Power Intake
2. Greddy Evolution cat back
3. 3" down pipe
4. New sparkplugs & wires

Car is a 1994 bone stock FD, base line dynoed at 215 rwhp (with bad sparkplugs).

Thanks.

 

I would expect to see 245-250 rwhp on that setup at ~10 psi.