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pdlouche-
Since the Vortex ECU install I've been on the hunt for one. Buying new from the US was eye-watering, when you factor in shipping/customs, so pleased to nab this second hand. Couldn't really notice any performance gains from my short test but the weight saving was a shock! Glad I went for the Q(uiet)4, as no doubt a loud pipe would soon get old on the local lanes.
jambon
Praise the Lord for eBay saved searches, a FMF Q4 full system finally came up for sale so I pounced on it.