street/track step-style header - 2002/E21 Stage 2 Our exclusive 4-into-1 step header. The primary tubes of this regular steel header are 1.5" diameter and increase to 1 5/8". This 'step' helps scavenge the exhaust gases while maintaining high gas velocity - the result is the strong midrange torque of a 1.5" pipe header with the high end of a 1.625" header. They're great for performance street cars and for race cars up to about 175HP (SCCA ITB and ITA cars, VARA, etc.). These are top-quality headers designed specifically for the BMW M10 engine - dyno tests have shown they out-perform every other header on the market. Please allow for 2 week lead time for ceramic coating. Note 1: These do NOT fit right hand drive cars.(Australia, UK, Etc.) Note 2: The headers are made from mild steel. To prevent rust and corrosion, consider either ceramic coating (see main photo above) or using high-temp paint. Ceramic coating is special order, please allow for an additional 1 week lead time. Uncoated headers are painted black for protection during shipping, this black paint will burn off once headers are installed. Note 3: For street cars with a stock exhaust or our stainless steel exhaust system, order a 2.5" header Collector Adapter. Price: $445.00   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.