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HD Valves Springs 4.2L & 5.2L
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4.2L V8 FSI/TSI HD Valve Spring Kit w/Titanium Retainers
A must for high RPM and High Boost. Good for 8,000 rpm Intake 73 PSI @ 38.6mm Intake 178 PSI @ 10mm Lift Exhaust 85 PSI @ 37.2mm Exhaust 190 PSI @ 10mm Lift Max Intake Lift 12.5mm Max Exhaust Lift 11mm Coil Bind 24.90mm O.D. 24mm I.D. 16.5mm 32ea Springs 32ea Ti Retainers A must for high RPM and High Boost. Good for 8,000 rpm Intake 73 PSI @ 38.6mm In... -
5.2L V10 FSI/TSI HD Valve Spring Kit w/Titanium Retainers
A must for high RPM and High Boost. Good for 8,000 rpm Intake 73 PSI @ 38.6mm Intake 178 PSI @ 10mm Lift Exhaust 85 PSI @ 37.2mm Exhaust 190 PSI @ 10mm Lift Max Intake Lift 12.5mm Max Exhaust Lift 11mm Coil Bind 24.90mm O.D. 24mm I.D. 16.5mm 40ea Springs 40ea Ti Retainers A must for high RPM and High Boost. Good for 8,000 rpm Intake 73 PSI @ 38.6mm In...