07 Harley-Davidson FLHRC Road King Classic discussion forum: Do I need to replace the EFI module and Air Filter for Slip-Ons?
Title
Do I need to replace the EFI module and Air Filter for Slip-Ons? 
Entered by
bonejamin 
Date
2007-10-03 18:29:06 
Hello world,
Just joined the rank and file of HD riders with a new \´07 FLHRC here in Gaithersburg, MD. If anyone out there has first-hand knowledge/experience about the following, I\´d really appreciate hearing about it.
There seems to be some different opinions about whether or not one needs to put in a new fuel injection module (mapped to the specs of the bike) and a high performance air cleaner when using a stock exhaust system with new slip-on mufflers. I\´m sure adding this will help, but since I\´m not changing the engine components and I\´m leaving the stock pipes and crossover, is it worth the extra $$$ in cost and time or will my honey backfire, wheeze, and/or groan if I don\´t do it?
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