Supertech Dual Valve Spring Kit for 2020+ Supra GR Syvecs longevity and insurance against power

longevity and insurance against power robbing boost leaks

Fits all 4G63 Evolution I-IX and 1G/2G DSM

For searching reference

• Recommended in all builds above 350hp

5 +30 (5x114

Supertech Dual Valve Spring Kit for 2020+ Supra GR Syvecs longevity and insurance against powerSupertech dual valve spring kits for 2020+ Supra GR. Includes 24 dual springs, 24 titanium retainers. Available in two options with 75lb or 85lb seat pressure. Please do all your research and consult your engine builder if necessary! Vehicle Fitment: 2020 2021 Toyota Supra GR MKV MK5 B58B30 Engine Install Notes: Uses OEM Seats Purchase Includes: (24) Dual Valve Springs (24) Titanium Retainers Part Number: Pressure Seat: SPRK B58B 75lbs @ 37mm 155lbs @