Hedman Street Headers - 1.75 in Primary - 3 in Collector - Black Paint - Small Block Chevy - GM F-Body / X-Body 1970-81 - Pair YA0864 Melling expansion/freeze plug bulk packs

Melling expansion/freeze plug bulk packs are available in either steel or brass depending on engine usage and customer preference

Unlike cheap

2009-2011 Chevrolet Avalanche

and highly modified street class cars operating between 3000 and 7500 rpm (higher rpm ranges possible depending on combination of parts)

Proform Rocker Arm Aluminum Stud Girdles 66951 For Use w/7/16" Stud

Hedman Street Headers - 1.75 in Primary - 3 in Collector - Black Paint - Small Block Chevy - GM F-Body / X-Body 1970-81 - Pair YA0864 Melling expansion/freeze plug bulk packsHedman 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