The problem with this gasket is that the manufacturer is trying to save some material by leaving voids at the bottom of the gap. Unfortunately this doesn't leave room for holes or mixing to fit your intake manifold as it doesn't leave enough surface area for a good seal. The other big issue is that all the hardware that comes with the spacer is very low quality. Every bolt that came with it had a kink and once installed in the intake manifold there is no easy way to slide the gasket down. In fact, the only way to get it working is to straighten out the hardware. In general, the spacer is not bad. Would I recommend this spacer? Probably no.