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Bunch of bs. They did a bunch of dyno comparisons in one of my power and performance classes and none of those "performance plugs" did better than a normal copper race plug.
12 cbr250r: daily ride
01 saab 9-3: daily
98 gsxr 1100: for sale
93L: money pit/ space waster
92GL: low and slow beater
90?: the rust free shell
89LX: swapping to rust free shell
89L: for sale
89L: parts
87 conquest: dohc 4g64 swap underway
76+80 vw dashers: for sale
One of my customers with a mazda 6 tried these out and they broke when he was installing them, then when he got a second set installed without breaking they gained him nothing. Just my experience with them so far....
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