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I have a stage 1 Pulley swap To a 3.1 been on for like a year than one day just drivin I had a bad spark plug then cylinder dropped said I had misfire then spun a bearings is this y help
ummm more info please. are you saying you have a supercharged car with a 3.1" pulley? what supporting mods are you running? have you been scanning the car to look for KR?