Iv got an Audi A3 1.8T 1999

Im going to get a perfromance CAT fitted + Pipercross Viper Induction Kit + Re-circulating Blow Off Valvefitted, then then im having the ECU remapped.

Any Advice?

Good points, bad points?

What kind of BHP gain will i be looking at getting?

Cheers everyone

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Audi A3 1.8T, 219BHP, 232lb/ft, Milltek Bigbore Downpipe, Milltek Performance Cat, Miltek Cat Back, Forge Re-circulating DV, Pipercross Viper Induction Kit, Stage 2 REVO Remap, 4 Bar Fuel Pressure Regulator

Andis it worth getting upgraded down pipes fitted?

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Audi A3 1.8T, 219BHP, 232lb/ft, Milltek Bigbore Downpipe, Milltek Performance Cat, Miltek Cat Back, Forge Re-circulating DV, Pipercross Viper Induction Kit, Stage 2 REVO Remap, 4 Bar Fuel Pressure Regulator