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Old 08-25-2016, 02:15 PM   #12
Drives: Nickey Super Camaro
Join Date: Nov 2008
Location: St Charles
Posts: 1,536
NicKey Performance tested on the Wegner NASCAR certified engine dyno with both the LS3 and LS7. We use 2" on most all LS7 builds and 2" on most LS3 / LSA FI builds and 1 7/8ths on L99/LS3 N/A builds up to 600hp.

Also, your exhaust system after the header collector can have an impact on the overall power results as well.
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