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Discussion Starter · #1 ·
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%?
 

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13,888 Posts
No offense intended ...

Why b*stardize a Works MCS by changing the pulley size :confused:

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 ;)
 

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Track addict
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Why not? Go for it. You can always swap it back to standard before selling on.

If however you want to transform the car, get the sirbox upgrade, it'll put the smile back on your face, and your car will still be a 'Works'...
 

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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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