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A 2.75/6lb gives you 16psi? Thought it was more than that.

I say 510/500

 

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It could also be less because you have no cats and a straight through muffler. When I put the slp on my car I lost boost. Its because there isnt as much back pressure. I bet if you had a baffled muffer and cats you would be seeing more boost. Im going to make the switch soon.

 

And your right, the 2.8 upper only should be 16psi.

 

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Lol. yea i had an slp xpipe with cats and the loudmouth 1 exhaust and that thing was just way to loud, so I put the stock H back on for now. Im thinking about getting magnaflow mufflers and a catted MRT Hpipe. I think that would sound pretty mean. Not too loud normal driving but loud when you get on it. Let me know what you dyno. Im buying a ported blower this weekend. Its a steig stage 4. Havent decided what pulley combo Im going to run though.

 

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