Supertech 13.80mm Max Lift Single Valve Spring Kit | 2017+ Honda Civic Type R (SPRK-K20C-1) Volkswagen Golf GTI MK8.5 (2025+) +15 HP / +17 lbs

+15 HP / +17 lbs

Part Number: 827-731

Handcrafted In The USA

Technical Specs:

Ultra-Web Filtration Technology for Maximum Engine Protection

Supertech 13.80mm Max Lift Single Valve Spring Kit | 2017+ Honda Civic Type R (SPRK-K20C-1) Volkswagen Golf GTI MK8.5 (2025+) +15 HP / +17 lbsFITS: K20c1 , k20c4 engines Supertech Spring Retainer kits are precision matched sets for a complete valvetrain overhaul. Developed for the performance enthusiast that wants the best the industry has to offer, Supertech Spring Retainer kits are second to none in terms of performance, quality and value. Features Seat Pressure: 77 @ 40. 60 Open Pressure: 176 @ 10 Max Lift: 13. 80mm Coil Bind: 27. 30mm Rate: 9. 9 Kit spring: SPR H1003S Retainer: RET 1003