Ask AA, they would know best. Since you have a 328- if you have a stock exhaust- the answer is probably yes.
If you have a 325/330 with the dual exhaust- maybe not so much. Either way I think you can get some minimal gains on a lower stage FI car with a really well though out system.
"All lies and jest, still a man hears what he wants to hear and disregards the rest."