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I've just had the JB4 and a AA catted 400 cell downpipe fitted yesterday.
Running map 2 on 98, coming onto boost is a lot more noticeable and it pulls to redline harder.
It's not a kick in the back so to speak but I feel like it has livened up the engine. The auto shop that installed it recommended I dont use map 3 unless I add in octane booster.
You can see cables on the passenger side (Left) as the unit is tucked under the grill below the windscreen.
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