Probably an over asked question but here goes....please dont hate me

Anyway iv had my little fiesta for about 8 months now and fancy making it a little quicker!
Looked at the mountune kits but seem kinda expensive for the gains :/ so I got my self a K&N 57i kit cheap from a guy on gumtree and iv got a mongoose flexi pipe on the way (also bought cheap on gumtree...yes im a tight arse)

My question is what gains would I see from these 2 mods alone?
And what gain would I see overall with a remap ontop of this?
Could anyone reccomend a cheapish but descent map to go with the mods.

Any replies will be appreciated. Thanks

 

Reckon you'll get about 5-10bhp more out of it with those mods described, as for a remap, jamsport seem to do a lot with the ST so I'd give them a bell, cheaper may not be better.