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the LS3 heads flow very well and arent worth porting unless u get an extreme cam or go the FI route. im running a Smooth Idle Blower Cam from Janetty Racing very streetable and so is the Rough Idle Cam with your mods you would be looking at about 450 rwhp. A blast on the street and strip. oh the money u would spend on porting the heads wouldnt be worth the power u gained unless u went those other routes i mentioned before. good luck with your decision
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