A gas spring and gas damper assembly (110; 200) comprising: a flexible spring member having a longitudinal axis and including a flexible wall extending peripherally about said axis and longitudinally between opposing first and second ends (214, 216) to at least partially define a spring chamber; a first end member extending across said first end of said flexible spring member and secured to said flexible spring member such that a substantially fluid-tight seal is formed therebetween; a second end member extending across said second end of said flexible spring member and secured to said flexible spring member such that a substantially fluid-tight seal is formed therebetween, said second end member including an end member wall that at least partially defines an end member chamber having a fixed volume; a damper rod extending longitudinally between opposing first and second ends (278, 280) with said first end operatively connected to said first end member and said second end disposed within said end member chamber of said second end member, said damper rod including a gas transfer passage extending lengthwise along at least a portion thereof, and said damper rod including a plurality of orifices (322, 324, 326, 328, 330) in fluid communication with said gas transfer passage; a partition wall extending across said end member chamber and secured along said end member wall such that said end member chamber is separated into first and second damping chambers (292, 294) having corresponding first and second fixed volumes; a first damper piston disposed within said first damping chamber and separating said first damping chamber into first and second chamber portions (292A, 292B); a second damper piston disposed within said second damping chamber and separating said second damping chamber into first and second chamber portions (294A, 294B); and said first and second damper pistons (300, 302) being secured to said damper rod such that one orifice of said plurality of orifices (322, 324, 326, 328, 330) is disposed in fluid communication with said spring chamber, and such that said first and second damper pistons (300, 302) move relative to said second end member and said partition wall upon displacement of said first and second end members (206, 208) relative to one another; characterized in that said first and second damper pistons (300, 302) are secured to said damper rod such that each remaining orifice (324, 326, 328, 330) of said plurality of orifices (322, 324, 326, 328, 330) is disposed in fluid communication with a different one of said first and second chamber portions (292A, 292B, 294A, 294B). a flexible spring member having a longitudinal axis and including a flexible wall extending peripherally about said axis and longitudinally between opposing first and second ends (214, 216) to at least partially define a spring chamber; a first end member extending across said first end of said flexible spring member and secured to said flexible spring member such that a substantially fluid-tight seal is formed therebetween; a second end member extending across said second end of said flexible spring member and secured to said flexible spring member such that a substantially fluid-tight seal is formed therebetween, said second end member including an end member wall that at least partially defines an end member chamber having a fixed volume; a damper rod extending longitudinally between opposing first and second ends (278, 280) with said first end operatively connected to said first end member and said second end disposed within said end member chamber of said second end member, said damper rod including a gas transfer passage extending lengthwise along at least a portion thereof, and said damper rod including a plurality of orifices (322, 324, 326, 328, 330) in fluid communication with said gas transfer passage; a partition wall extending across said end member chamber and secured along said end member wall such that said end member chamber is separated into first and second damping chambers (292, 294) having corresponding first and second fixed volumes; a first damper piston disposed within said first damping chamber and separating said first damping chamber into first and second chamber portions (292A, 292B); a second damper piston disposed within said second damping chamber and separating said second damping chamber into first and second chamber portions (294A, 294B); and said first and second damper pistons (300, 302) being secured to said damper rod such that one orifice of said plurality of orifices (322, 324, 326, 328, 330) is disposed in fluid communication with said spring chamber, and such that said first and second damper pistons (300, 302) move relative to said second end member and said partition wall upon displacement of said first and second end members (206, 208) relative to one another; characterized in that said first and second damper pistons (300, 302) are secured to said damper rod such that each remaining orifice (324, 326, 328, 330) of said plurality of orifices (322, 324, 326, 328, 330) is disposed in fluid communication with a different one of said first and second chamber portions (292A, 292B, 294A, 294B).