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We recently had the pleasure of working on Ralph's beautiful 2012' ZL1 convertible. Last year Ralph stopped in for an Airaid induction and American Racing 2" Long tube off-road headers with a full dyno tune. The car left with 500RWHP/502RWTQ with duty cycle of the injectors approaching 100%. This time around we went with a Metco 2.4" upper pulley, solid isolator, Metco idler, and a set of Injector Dynamics 850s.
The results were 573RWHP/582RWTQ! :D

 

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so what ya recommend for a 2014 zl1.. upper pulley..?..lower pulley??.....50-50 for ported throttle body...injectors- IDs;;or Siemens 60's...?...????


Rick
 
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