Earl's Straight Bulkhead Adapter Fitting -4 AN Male to -4 AN Male Bulkhead - Black YA0828MM04 Kit relocates the breather exit

Kit relocates the breather exit location and helps prevent fluid from leaking or blowing out of standard breathers

Best power above 3500 RPM but still good torque

2007-2017 GMC Sierra 3500 HD

Rear Main Seal Housing

Earl's Straight Bulkhead Adapter Fitting -4 AN Male to -4 AN Male Bulkhead - Black YA0828MM04 Kit relocates the breather exitProduct Description: Fitting Bulkhead Straight 4 AN Male to 4 AN Male Bulkhead Aluminum Black Anodized Sold Individually Earl's Performance Products was founded by Earl Fouts in 1955 in Lawndale, California. The mission was to supply high quality military aircraft surplus plumbing components directly to the racing industry from a small retail outlet. As the military surplus market dried up, Earl recognized the need for continuity of supply for the