Ferrea Racing Valves & Components! This listing is for a complete set of 8 Ferrea 6000 series exhaust valves for SBC LS1 Engines This listing includes Ferrea part numbers: F6270 x 8 (exhaust) - Ref: 24 Deg Tulip Super Flo. Radius Groove Head Diameter: 1.650 (exhaust) Stem Diameter: 0.313 (exhaust) Valve Length: 4.915 (exhaust) Tip Length: 0.16 (exhaust) Product Info The 6000 Series Competition Valves are designed to provide excellent reliability in an environment of high spring pressures and roller cams, at a budget price. They have higher fatigue resistance and tensile strengths than our competitor's best offerings. These valves can be used in Drag and Oval Track racing applications. To manufacture the valves we use our exclusive two-step slow forging process using EV8 stainless steel on both intake and exhaust valves. We provide a special heat-treatment and stress relieving process, along with hard chrome stems and friction-welded hard tips. We finish with a swirl polished head. The valves feature flow improvements to deliver the power needed for today's sophisticated racing engines. These valves are available for both the traditional Domestic performance and racing engine market and the Sport Compact performance and racing market. Your order will be processed within 24 hours. Please check with your specific country so you will be aware of any additional charges.