These manifolds have both the inlet, and the outlet ports machined to match the factory gaskets. This allows for maximum flow, without compromising gasket performance. These manifolds have 25% Thicker walls than the crack-prone factory manifolds. The increase in thickness increases the rigidity of the manifolds and make them much more durable than the OE manifolds. These manifolds bolt directly to the factory y-pipe for an easy installation.This Part Fits:YearMakeModelSubmodel2009-2010DodgeRam 1500Laramie2009-2010DodgeRam 1500SLT2009-2010DodgeRam 1500Sport2009-2010DodgeRam 1500ST2009-2010DodgeRam 1500TRX2009-2010DodgeRam 1500TRX42011-2018Ram1500Big Horn2012-2018Ram1500Express2014Ram1500HFE2011-2018Ram1500Laramie2014-2015Ram1500Laramie Limited2011-2018Ram1500Laramie Longhorn2015-2018Ram1500Limited2014-2018Ram1500Lone Star2011-2016Ram1500Outdoorsman2013Ram1500R/T2015-2018Ram1500Rebel2011-2018Ram1500SLT2014-2018Ram1500Special Service2011-2018Ram1500Sport2011-2012Ram1500ST2011-2018Ram1500Tradesman2019Ram1500 ClassicBig Horn2019-2022Ram1500 ClassicExpress2019Ram1500 ClassicLone Star2019-2022Ram1500 ClassicSLT2019-2023Ram1500 ClassicSpecial Service2019-2024Ram1500 ClassicTradesman2019-2024Ram1500 ClassicWarlock
