well the car ran fine like the first 10 miles i drove it. it idled fine didnt backfire. but once i started it up again like 3 hours after those 10 miles it went to shit. i dont think its cause im running super rich. cause i turned my safc to run leaner and it didnt help the idle 1 bit. also once i took out the spark plugs the 1 and 2 look find but 3 and 4 are black.

any ideas? i only threw on the 550's cause my friend needed the 370's for his car to run

well found out the problem them silly little lower orings broke. good thing i have 4 extra's