| 1983-1989 Porsche 944 Booster Check Valve - Genuine 477 611 933 A Porsche 944 Booster Check Valve. Brand: Genuine. Fits Years: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 83, 84, 85, 86, 87, 88, 89. Brake Booster Check Valve (L-Shape) -- with Factory A/C - 477 611 933 A ... more 1983-1989 Porsche 944 Booster Check Valve - Genuine 477 611 933 A Porsche 944 Booster Check Valve. Brand: Genuine. Fits Years: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 83, 84, 85, 86, 87, 88, 89. Brake Booster Check Valve (L-Shape) -- with Factory A/C - 477 611 933 A Partsgeek.com | | $54.73 go to store |