The Boost Increase Valve, is designed for 2001-2004 Duramax LB7 diesel engines. Increases boost pressure from 18-20 to 28-30 psi for additional horsepower and also reduces EGT (exhaust gas temperatures). Additional fueling with a programmer may be needed to gain higher boost levels. Simple 5 minute install.
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Good product for how little and cheap it is makes a major difference on what you can get out of your stock turbo i would recomend gettiing it youl notice a difference!!!!
I was skeptical but for under $30, why the hell not? A quick and easy installation for a decent improvement. There is a noticeable improvement in boost and so far, an improvement in mpg (haven't fully tested that theory yet). All in all, a great, cheap improvement for an LB7!
Give it about 6 or 7 lbs. of boost. Well worth it!