For upshifting, I didn't notice any difference whatsoever between my '09 coupe without srm and my '10 with srm. Downshifting with the srm is only really useful for the track. I leave it on because I get a kick out of the throttle blips downshifting. Heck, I paid for it so I might as well use it.
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"America.... still builds rockets!"
Vette: 355 cid, 400 rwhp
'13 CTS-V Coupe: 6.2L LSA, 556HP
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