Chrome side vents are very splangly and american - not very british - but each to his own etc.
Back to sports pipes and I believe that the S1 sports exhuast I have (as shown in Aeromans pic of his green Aero (Kermit)) is the bassiest I've heard.
I thought (though seems I'm wrong as viper has it on his s1) that the 4 pipe version was for S2/3 cars and the 2 pipe version for S1's...
Side pipes have a more 'figher plane' rasp when pushed hard which does sound fantastic.
Anyone know if the rear diffuser can be retrofitted to an S1 (If you get sidepipes fitted as well?)