Hi, i have a MCS 2006 no-jcw (only msd, nology cables and jcw CAI without the flap... I took it off...). If i put the jcw map, should i see any gain in Hp, a higher redline?? or i would be running extremely rich and lose hp??? I've been reading some jcw posts! and some says that the jcw tunning kit come with a smaller pulley... is it true??? What do you recommend????

 

Yes, the JCW comes with a smaller pulley--about 11-12%.

I'd get a 15% pulley. You have a cold air intake, that'll be biggest bang for the buck. Rather than a JCW map, I'd get a custom tune (RMW or someone else in your area). The JCW kit also has 380 injectors, which have to be taken into account if you're getting the JCW map...

That's just me though...

 

i will be buying the 17% pulley... Its just that i have someone that can put the jcw map (no cost) ...

 

If you can get the map for free then go for it, but I would put jcw injectors in the car