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I have ported heads, ported intake mani, ported exhaust mani's, stage 1x cam, ported supercharger, downpipe and exhaust dump,


would 42.5's be a good investment, or should stockers still work, ipw from the old set up, all that minus the cam add 1.9's the ipw were around 18-21
 

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If your injector Duty cycle at WOT is greater than 100, they are maxed, anything over 80% isnt good, but you can run them til 100%
 
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