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The Kooks Fast Burn small block Chevy header flange is 3/8in thick mild steel with the inline stock 6-bolt pattern and ports sized for 1-3/4in primaries. Sold individually, this flange is built for Fast Burn/LT1 small block Chevrolet header applications and provides a direct bolt pattern for head-to-header assembly or custom fabrication.
Kooks SB Chevy 1 5/8in St. Fast Burn Chevy Flange (Bank)
