The thicker 2.5" tubes on the modded manifolds touch the stock intake where it bends inward toward the t/b on both sides. I managed to squeeze the stock unit on but it was slightly kinked and stretched. Not exactly a perfect fit. If you were determined to run the stock intake or sl55 intake im sure it would work properly with small extensions in the intake tubing where the area of interference occurs.

The BDJ's intake did fit, my NW style custom intake fits, a member who has an actual NW intake is probably going to purchase a set of my manifolds just to confirm 100%(should be no problem).