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I was never able to get the HKS's to hold steady boost past 18psi. I was ready to hook another spring along side them right to the flapper arm, but ended up just settling for 18lbs. It was plenty fast...
Last dyno 512 whp 470 lbs-tq On 93 octane @ 17psi Best 1/4 mi on the old engine: 12.59 & 120mph on old steet tires Daily driver, 05 Titan KingCab Tow package, 2.5" lift kit.
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