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Tune your 2024-2025 Silverado/Sierra 2500/3500 with the 6
Level 4: +90 HP
and more reliable than the factory design
These can powdercoat in any color you'd like
Installed custom engine tuning
Big Boost Valve Spring Kit | 1998.5 - 2024 Cummins Tuning Packages Tune your 2024-2025 Silverado/Sierra 2500/3500From daily drivers and heavy duty tow rigs to full blown drag strip builds, these springs are engineered to handle everything from mild upgrades to wild performance. Unlock the full potential of your Cummins engine with the Performance Diesel Worx Big Boost Valve Spring Kit, engineered for superior performance, durability, and reliability. This complete drop in package delivers 103 lbs. of seat pressure and 176 lbs. of open pressure at 0. 420