Volant 15742 2006~2009 GMT 360/370 Trailvoy, etc. I-6
I should of just brought the filter (Volant 5113) Air Duct was not any larger than stock, but does have a smoother inner liner for better air flow. Air box/Filter cover needed extensive trimming and does not fit that well. I also had to add a bracket to keep the air filter from rattling inside the air box between cover and washer fluid reservoir (even with 7.5" weatherstrip trim installed) Has slightly better pick up with slightly more intake growl.