Yes they have been tested... They have been physically tested and torture tested for 5hours straight. All gears come with documentation. Oem gears have broken on multiple cars even Zeliminator has broken them as stated in his post after running 8200rpm
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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054
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