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Don't buy the Denso spark plugs, there crap, buy the HKS M45iL. The HKS will cost more but you get what you pay for. I owned a JB4 back in the day, love it but I went with a ECU tune. The JB4 is nice because when you take your car to the dealership it's easy to remove.
I had a jb4 for years and it definitely gets the job done. There's a new tuner option though that people are excited about since it's a full ecu tune that can be done remotely using a handheld unit. So, easy to change maps and flash back to stock when going in for service.
Look at the package deal over on K8 Stinger store. Injen dual intakes, dual ADD-W1 catch cans, HKS plugs, JB4 and bluetooth adaptor, MBRP cat back exhaust. All for around 2900.00.
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