Jul 23, 2008 #1 M Mr.Runner Registered User Joined Jul 6, 2008 Posts 4 Reaction score 0 Location Penticton B.C was wondering, what can be done to 5.4l to improve the ****** low rpm range in the motor. mines got manaflow muffler.
was wondering, what can be done to 5.4l to improve the ****** low rpm range in the motor. mines got manaflow muffler.
