Boost Control Solenoid Kit Boost Control Solenoid - Replacement - Fittings Included - AEM Boost Controllers - Kit

Dual Stage V2 Boost Controller Black Boost Controller - V2 - Dual Stage - Manual - Dual Adjustable - Black - Universal - Kit

HR Valve Spring Kits - Dual GM LS Valve Spring Kit - Dual Spring - 392 lb/in Rate - 1.020 in Coil Bind - 1.304 in OD - Chromoly Retainer / Locks / Viton Seal / Steel Seat - GM LS-Series - Kit

1.470 Dual Valve Spring Kit - w/Damper Valve Spring - Dual Spring - 399 lb/in Spring Rate - 1.080 in Coil Bind - 1.470 in OD - Locks / Chromoly Retainers - Kit

1.514 Dual Valve Spring & Retainer Kit w/Damper Valve Spring Kit - Dual Spring / Damper - 348 lb/in Rate - 1.150 in Coil Bind - 1.514 in OD - Locks / Chromoly Retainers - Kit