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Originally Posted by DenHaag3er
How are these for euro cars? I had a JB4 on a euro golf gti and it ran fine but still its a concern on a high end car with different ECUs, exhaust and fuel.
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The B58 JB4 is 50-state CARB approved and TUV approved so it's been very rigorously tested. The JB4 was originally for BMW models with VAG, MB, and other German brands only being added years after it was launched so their BMW tuning is still the best IMHO.