Anyone used Professional Products upper plenum?

I have seen that one but havent heard of anyone using it. IMO all the plenums are probably about the same in performance and quality. Some may be a bit better then others in a few things. As long as its raised and smooth and rid of all the nasty factory casting then its good. A part of the performance that you gain from them is the whole plenum being raised. This is why for now i chose to go with a intake spacer and factory ported plenum. Maybe one day when i get bored ill get the polished dragon plenum.

See if you can find out what material that one is made of. It's gonna have to be something that can withstand repetitive heat soaking and cooling or it's gonna crack in a few months.

BlueStreak03 said:

See if you can find out what material that one is made of. It's gonna have to be something that can withstand repetitive heat soaking and cooling or it's gonna crack in a few months.

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Well, I decided to buy it. I would imagine that Professional Products makes this plenum with materials suited for the job. They make lots of intake manifolds for pushrod engines, and have a great reputation for those products.

as long as it's not some third rate company that you've never heard of before and you're comfortable buying one of their products. I personally have never heard of them though.