Leather Seat Cover L06 CV Beige/Black Front LH Driver Side Backrest OEM SAAB 740 (85-91) 940 without AC Bend: 90 degree Inner diameter ACC:With Clamp Kit body U028990 Y pipe with elegant

Leather Seat Cover L06 CV Beige Black Front LH Driver Side Backrest OEM SAAB 740 (85 91) 940 without AC Bend: 90 degree Inner diameter ACC:With Clamp Kit body U028990 Y pipe with elegant Bend: 90 degree Inner diameter 1 (mm): 80 mm Inner diameter 2 (mm): 83 mm Inner diameter 1 (inch): 3 1 8 inch Inner diameter 2 (inch): 3 1 4 inch Leg length (see picture): 125 mm Color: Black Wall thickness: 5 mm Temperature range: 40 to +180 degreeC Outer diameter 1: 90 mm Outer diameter 2: 93 mm Reinforcement: 4 layers Material: High quality silicone rubber polyester fabric How do I adjust the spring pressure to suit different boost levels