With the stock headers your turbo will spool up quicker, most kits are designed for stock headers which is nice. If u use the stock headers get rid of the cats, just my .04$
LT headers work nicely with SCs
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2017 ZL1 A10: 8.84 @ 156 PB
2017 ZL1 A10: Previously FBO 756/761 (9.6 @ 143 1/4)
SOLD-2013 ZL1 M6:BTR,LTs,IDs,ATI,RotoFab10.84@129
SOLD-2011 SS M6: Blower, Cam, Alky, LTs.
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