Since my warrantee already expired, I would like to try something new, is that possible to upgrade SC pullies on my JCW? We all know the JCW comes with 13.8%, should I replaced them with Alta 15% or Helix 17%?
Why b*stardize a Works MCS by changing the pulley size
Upgrade the kit to 207 hp (air box, larger injectors and ECU remap), add an exhaust header and throttle body (for minimal gains) or sell the JCW car (before you de-value it), buy a stock MCS and twin-charge it
I don't why you'd want to go back to the standard pulley anyway, but I was told, when I had my pulley job done, that it could not be reversed. Once you get the pulley, you're just "stuck" with all that extra hp.
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