Big Block Chevy Drag Race Header Set2-3/8" - 2-1/2" Two Step Primary Tubes4-1/2 Merge CollectorsChrome Finish. Big Block Chevy Drag Race Header Set. 2-3/8" - 2-1/2" Two Step Primary Tubes. Around here, we don't just sell parts - we rely on them when driving our own cars around racetracks, dirt trails, and interstates across the country. Parts may be our business - but grease, fuel, exhaust, power, and speed are what we live for.Today, more than 350 people are employed by JEGS and the business draws in hundreds of thousands of customers each year. Yet, we maintain the culture stared by Jeg Coughlin from the very beginning: a family-run performance shop that preserves a trusted relationship with each and every customer. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Other Car & Truck Parts & Accessories". The seller is "jegsperformance" and is located in this country: US. This item can be shipped to United States.