as i posted a couple weeks ago i gotta replace my gimbal housing due to the salt. thinkin while the motor is out maybe a good time for manifolds. anyone have experience with the aluminum ones? boat is always flushed well after bein in the salt and gets used in fresh water alot. damage to the gimbal housing occurred before i purchased the boat about 2 yrs ago. mainly interested in the weight savings. heavy boat always loaded with ice n such. 100 pounds or so would sure help! motor is a 350 mag.