A vehicle suspension damper comprising: a cylinder containing a piston assembly comprising a piston and piston rod; a working fluid within the cylinder; and a bypass circuit connecting a first side of the piston and a second side of the piston, wherein the bypass circuit includes a cooling chamber; further comprising a passageway (110, 112) through the piston allowing and limiting a flow rate of the working fluid through the piston in at least one direction; wherein the bypass circuit comprises a fluid pathway having the cooling chamber disposed therein, and wherein the fluid pathway in the bypass circuit is restricted by a first user-adjustable needle-type throttle and check valve (280; 500) that permits fluid flow in a first direction and restricts flow in a second direction; wherein the cooling chamber is located remotely from the cylinder and is connected to the cylinder via fluid conduits (221, 222); wherein the bypass circuit is operable in the rebound stroke of the piston; the vehicle suspension damper further comprising a further bypass assembly comprising: a tubular body that is fluidly coupled with the damper cylinder through bypass entry aperture located towards a lower end of the damper cylinder and a bypass exit aperture, wherein the bypass assembly is designed to permit damping fluid to travel from a first side of the piston to the other side without traversing the passageway (110, 112) through the piston that may otherwise be traversed in a compression stroke of the damper; and a second user-adjustable needle-type throttle and check valve (180; 500) that sets flow resistance through the bypass assembly during a compression stroke and restricts fluid from entering the bypass assembly during a rebound stroke, wherein the second user-adjustable needle-type throttle and check valve (180; 500) is located proximate to bypass exit aperture. a cylinder containing a piston assembly comprising a piston and piston rod; a working fluid within the cylinder; and a bypass circuit connecting a first side of the piston and a second side of the piston, wherein the bypass circuit includes a cooling chamber; further comprising a passageway (110, 112) through the piston allowing and limiting a flow rate of the working fluid through the piston in at least one direction; wherein the bypass circuit comprises a fluid pathway having the cooling chamber disposed therein, and wherein the fluid pathway in the bypass circuit is restricted by a first user-adjustable needle-type throttle and check valve (280; 500) that permits fluid flow in a first direction and restricts flow in a second direction; wherein the cooling chamber is located remotely from the cylinder and is connected to the cylinder via fluid conduits (221, 222); wherein the bypass circuit is operable in the rebound stroke of the piston; the vehicle suspension damper further comprising a further bypass assembly comprising: a tubular body that is fluidly coupled with the damper cylinder through bypass entry aperture located towards a lower end of the damper cylinder and a bypass exit aperture, wherein the bypass assembly is designed to permit damping fluid to travel from a first side of the piston to the other side without traversing the passageway (110, 112) through the piston that may otherwise be traversed in a compression stroke of the damper; and a second user-adjustable needle-type throttle and check valve (180; 500) that sets flow resistance through the bypass assembly during a compression stroke and restricts fluid from entering the bypass assembly during a rebound stroke, wherein the second user-adjustable needle-type throttle and check valve (180; 500) is located proximate to bypass exit aperture. a tubular body that is fluidly coupled with the damper cylinder through bypass entry aperture located towards a lower end of the damper cylinder and a bypass exit aperture, wherein the bypass assembly is designed to permit damping fluid to travel from a first side of the piston to the other side without traversing the passageway (110, 112) through the piston that may otherwise be traversed in a compression stroke of the damper; and a second user-adjustable needle-type throttle and check valve (180; 500) that sets flow resistance through the bypass assembly during a compression stroke and restricts fluid from entering the bypass assembly during a rebound stroke, wherein the second user-adjustable needle-type throttle and check valve (180; 500) is located proximate to bypass exit aperture.