How is this done and what is it? I have a 1991 L98... I have heard bout this but never really knew what they mean't by it. Anyone
You could clean up the front of the plenum where the TB attaches and not touch the runners. It wouldn't make sense to port and siamese the plenum w/o doing the runners. You could also port/siamese the plenum and the side of the runners that connect to the plenum and not do the intake base. I did a search on this and grumpyvette said siamesing the base will cost you torque. Here's the link, it's a good read.Hey War Machine and other that have tried this.... do you feel or does it really make a difference if you do it to the Plenium and the Runners? I am kinda scraed oftrying this and messing something up....