I got bosch platinum +4 also. Was going to go with the irridiums, but too expensive. Its a spark plug, i can't see there being that much of a performance increase. Definetly smoother with new plugs, but thats just it, they're new plugs. i decided to save a little $$ and just purchased all Amsoil fluids ( engine , transmission, t-case and diff oil) from Fred. This way i'll have a little more then just great plugs.
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7"Front lift 315/75-16 BFGoodrich AT's on 16x8 MB Motoring with TC lift, Team West Coilovers, Deaver 3 leaf spring pack on 4" block with Bilstein 5100's in rear; Volant Intake; Spin-Tech Muff
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