Valve spring AUDI 2.7T - DOHC 30 VALVE (APB) - 1998-2004 FA-S10056

All racing engines experience high-frequency harmonic fatigue that typically damages the driveline if not controlled. Engineered valve springs provide the required stability and reduce component wear. Ferrea valve springs are developed from high-strength alloys, including premium chrome silicon steel. Our springs are heat treated and stress relieved, dramatically increasing spring life. Our valve springs provide the stability needed for high speed engines while minimizing load losses for today's aggressive valve combinations Fits: AUDI 2.7T - DOHC 30 VALVE (APB) - 1998-2004 Dimensions: Type: Double Outer diameter: 22.75 mm Inner diameter : 17.1 mm Compressed pressure: 80 lbs Expansion pressure: 180 lbs Hardness: 254 lbs Compressed height: 20 mm Maximum exhaust: 12 mm References: (Exhaust valve - 12 pieces) In all race engines there is harmonic high-frequency fatigue, which usually destroys the drive system if it is not controlled. Properly designed valve springs ensure the required stability and reduce component wear.Ferrea valve springs have been developed from high strength alloys, including premium grade chrome-silicon steel.Our springs are heat treated and stress relieved, which radically increases the life span of the spring . Our valve springs provide the stability needed for high-speed motors while minimizing load losses for today's aggressive valve combinations.Fits: AUDI 2.7T - DOHC 30 VALVE (APB) - 1998-2004Dimensions: Type: DualOutside diameter: 22.75 mmInside diameter: 17.1 mmSeat pressure: 80 lbs Open pressure: 180 lbs Rate: 254 lbs Coil bind: 20 mm Max Net Lift: 12 mm References: (Exhaust valve - 12 pcs)