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brian the mexican

  1. 01-04.5 LB7 Performance Parts Discussion
    will you need studs if u run a efi max effort tune? also i heard someone didnt want to get studs so they got twins?? is this true if u get twins u dont need studs? doesnt make sense to me
  2. 04.5-05 LLY Duramax Powertrain
    noticed some oily sludge under the motor. i doubt this is normal