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Reviews (1)
Dec 29, 2017
Great product , improved performance instantly. Perhaps a lil too much but.
Great product I would say performance improvement from current BMW standard plugs should be about 20% improvement and in comparison to generic new plugs use runs 20% smother. Life span reliability would be about 800% as the generic ones lasted about three weeks. On the down side with engines over 100k your cylinders might have an abrupt awaking. Other than that great product.