Hedman Street Headers - 58-64 Bel Air/Biscayne / 58-61 Brookwood / 64-73 Chevelle Oval Track Catalog Youth Helmets & Accessories 3/8" base thread diameter and

3/8" base thread diameter and

heat-treated

Additionally the 3

This strong billet aluminum mount has no bypass so it eliminates the possibility of unfiltered oil entering into the engine

Hedman Street Headers - 58-64 Bel Air/Biscayne / 58-61 Brookwood / 64-73 Chevelle Oval Track Catalog Youth Helmets & Accessories 3/8" base thread diameter andHedman Hedders Standard Uncoated Headers; 1 3 4" Tube Diameter; 3" Collector; Full Length Design Hedman's Standard duty, Uncoated Hedders are manufactured using 18 gauge, mandrel bent primary tubes (some models built using thicker 16 or 14 gauge tubing), and 1 4 flanges (some models use 3 8" flanges). Hedman Hedders has been manufacturing quality headers and exhaust components in the USA since 1954. Hedman Hedders Standard Uncoated Headers 1 3 4" Tube