The E.H.S is like the Dobeck and you're limited in the long run. The PC3 will need a map loaded. You can either do it yourself by hooking it up to a laptop or desktop if you'd like since it's a USB connection. Or you buy one from certain vendors that will load one for you depending on your mods. It's really simple to change a map so don't think it's complicated or anything. Only takes about 15 seconds to load a map. The PC5, once it has a base map, can change automatically depending on conditions since it has a sensor that comes with the Auto Tune kit. If you go with a full exhaust, you can get one with a bung welded in so it has a provision for the sensor. It's a little more expensive but IMO totally worth it.
2008 Honda 700xx Red/Black, Full Alba Exhaust, UNI Filter, EHS Lid, PC3, 13T Front,Pro Armor Pro XC Bumper (BIGGEST P.O.S EVER MADE), Pro Armor Full Chassis/Swing Arm Skids, PRM A-Arm Skids, Maxxis RAZR fronts and rears. In the works, ported/polished head, custom cam, ported T/B.
1997 Toyota Supra Black/Black with a little boost and 1300 hp
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2003 Mustang Cobra ditched the S/C for a 80mm hairdryer
2007 Yamaha R1 Charcoal/Black
2013 BMW 335 Coupe Deep Sea Blue/Black