the 20G's are on the tuner kits for 350Z as well, but 18G's on the bolt on kit, but it seems the tuner kit is the way they are going so they don't have to deal with the lack of a good engine management from Greddy
the tuner kits come with the bigger turbos assuming people will go big with an engine build and such, they are bigger and will have a slightly lower spool but probably not very noticeable
Last edited by westpak; 07-27-2009 at 11:43 PM.
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