The 304 Stainless Steel EGR Blocker plate for the Duramax Diesel 04.5 - 05 LLY only,this is intended for off road use only.
8th DIGIT OF VIN# IS 2. This will also fit the 01 - 04 LB7 that came with a EGR
Used to block exhaust from being reused as air intake. Can lower EGT’s and a possible gain in HP. Mainly used to keep the soot out of your intake manifold which can lead to other problems. Very easy to install and remove.
