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obx plugs work fine go with the sparko plug wires it gave me about 4 hp and better reaction time all i have is cold air intake exaust and obx headers without the plugs and plug wires my 03 p5 dyno at 118.5hp to the wheels 122.7hp after.

whats wrong with obx plugs and what about the sparko spark plug wires do they work?

spark plugs and wires obx spark plugs are the best i have them on my 03 mazda protege 5 2.0l they work great as for the wires i just ordered the sparko setup will see if it works.