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Old 01-13-2011, 05:58 PM   #8
elsololobo02's Avatar
Drives: 2014 ZL1
Join Date: Oct 2010
Location: San Diego
Posts: 272
Z Madness...or anyone who knows about turbos. Is it the tune or the size of the wastegate spring that effects how much psi you can boost to? If it is the spring is it simply replacing the spring to get more boost or do you have to buy a boost controller?
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