race header round-port style - 2002 Stage 3 Our 4-into-1 full race step-header. The primary tubes of this header use 1-5/8" diameter primaries and run a 2.5" collector w/ 02 sensor bung. If you prefer a 3" collector contact us or leave it in the comments section of your order. Note 1: The headers are made from mild steel. To prevent rust and corrosion, consider either ceramic coating or using high-temp paint. Ceramic coating is special order, please allow for an additional 1.5 week lead time. Note 2: This header was designed for ONLY for race engines with a "round-port" exhaust port (as found on period BMW Motorsport Cylinder heads). These cylinder-heads were often used on period Alpina race 2002's. The exhaust ports on these heads were opened up into a rounded shape for better flow. Note 3: These headers have been made with individual upper flanges and a slip-fit collector. Made right here in Southern California. Price: $505.19   Quantity to Add:   CONTACT US AT BMWSALES@2002AD.COM 1-800-4-2002AD 909-629-1955 outside of the USA COPYRIGHT © 2002 AD, ALL RIGHTS RESERVED.