396-454 BBC Headers, Fenderwell Exit, 4wd & 2wd, 69-91 Blazer. 2" Primaries with a 3 1/2" Collector. Headers come uncoated, bare steel.
Will NOT clear factory A/C
Does NOT require any body lift
Head flange is 5/16" thick, port opening 2.031" round, primaries 16 gauge mild steel.
**Intended for racing and off-road use only**
Note: Please allow 4-6 week build time.