Downpipe

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211
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S.W. Ontario Canada
Buick Ownership
2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
The LTG downpipe is 3" at the turbo but necks down to 2.5" right away. Hence why aftermarked downpipes are 3" and bolt right on.

Sorry mate, I missed the part of wanting to know the inlet size and i'm not sure about the LHU engine on the 2013' Verano.
 
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