Volkswagen Polo Harlekin 1.4-16v AFH Friedrichs exhaust test pull

1997 original Polo Harlekin, which a 1.4-16V AFH engine has been swapped into. completely refurbished engine. friedrichs exhaust system + stainless manifold, inlet manifold from a Polo 6N GTI and a intake from BMC. running approx 110HP.

[christianfacoetti]

Good morning I have a Polo 6n 1400 16 valves and I would like to understand what modifications need to be made to make it sound this way.