RiffRaff Plenum Reinforcing Inserts - 7.3 Powerstroke (L99-03) intercooler This redesigned bearing housing and

This redesigned bearing housing and backing plate design to fit 200% LARGER thrust bearings and upgraded wider and taller journal bearings

They are black oxide finished for extra durability

chrome moly was popularly considered a high strength material

All injector body’s are precision honed and new parts fitted to each individual injector body

4" ported housing with anti-surge for high flow

RiffRaff Plenum Reinforcing Inserts - 7.3 Powerstroke (L99-03) intercooler This redesigned bearing housing andRiffRaff Plenum Reinforcing Inserts Description: These billet 7075 Aluminum plenum inserts are a Riffraff Diesel original design and are patent pending. They are made to allow you to clamp down as hard as needed with T bolt clamps so that you don't have any boost leaks. Fix your bent and crushed stock plenums with our Inserts as well. This is a budget friendly option to buying full billet plenums. Easy install, no special tools needed. These were