GM Exhaust Manifold Gaskets For LS7 control arms these headers are available with

these headers are available with 1-3/4" or 1-7/8" primaries

The standard 3/4-inch unit (As was tested and flowed VS competition) 1400CFM @28 inch of water 1 inch SD street filter 1600CFM @28 inches of water

The ID1300x is an all new injector

expect a deeper tone with significantly less rasp

giving you much improved repeatability on the street

GM Exhaust Manifold Gaskets For LS7 control arms these headers are available withLS7 Header Exhaust Factory Gaskets Sold as a Pair. GM factory replacement gasket for LS7 cylinder heads. This is a stamped metal shim gasket with the d shaped exhaust port. Width = 1. 920" (at the widest point) Height = 1. 610" Floor = 1. 250" (bottom of floor, straight portion)