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Holley Center Hung Fuel Bowl Straight Adapter Fitting - 1/2-20 in Inverted Flare Female to 7/8-20 in Male - Brass - Hardline 23-TR1-N-XS See vivid aerial views ofInverted Flare Fitting Tube 5 16" Thread 7 820 (A) x 1 220 (B)(Fits Center Hung Float Bowls) Features: Inverted Flare FittingHolley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS