PPE Release Valve Shim Kit 113072000

2004.5-2010 GM 6.6L Duramax LLY/LBZ/LMM
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More fuel pressure equals more power and with the PPE Release Valve Shim Kit, you get both. The Release Valve Shim Kit increases the pressure needed to "pop off" the pressure relief valve (PRV). This means that the available fuel rail pressure remains high during full throttle driving and reduces the fuel flow through the fuel return system. The PPE Release Valve Shim Kit eliminates low fuel rail pressure DTC codes P1093 or P0087 (low fuel rail pressure during power enrichment) and is recommended for high performance and/or race applications.

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Install Sheet
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(36 Ratings, 2 Reviews) Average Rating:
Works like it should.
Zach Baker (Hempstead, TX) 3/9/2016 12:55 PM
Does exactly what it's supposed to on my 2007 LBZ, no more fuel pressure issues. I'm using this in conjunction with the ported fuel rail fitting from PPE.
No more limp mode!!!!
Anonymous (Unknown) 5/19/2008 9:38 PM
This is the best $20.00 I have ever spent. I had a tone of trouble on the dyno. I put the shims in and no limp mode,no fuel cut. The truck did 557rwh and just under a 1000ft pounds.And yes we have more than shims on the truck....