Uprated valve springs RENAULT Clio Megane F4R K4M 708

We offer here several kits of uprated springs and retainers from SUPERTECH and CATCAMS, whose technical specifications are given below. The price shown is for a COMPLETE kit.

Technical specification

• Spring type: dual
• Outer diameter of the inner spring: 20.00mm
• Inner diameter of the inner spring: 15.20mm
• Outer diameter of the outer spring: 27.50mm
• Inner diameter of the outer spring: 20.00mm
• Seat pressure / installed height: 37.65kg @ 34.00mm
• Pressure at full lift: 92.53kg @ 10.00mm
• Max lift: 13.30mm
• Supplied with retainers and spring seats
• Reference: SPRK-TS1015-F4R

SUPERTECH valve springs are made from a high-grade chrome silicon vanadium steel alloy. That alloy delivers higher performance and reliability, especially at high engine speeds, and has better structural memory. SUPERTECH uprated valve springs are designed by computer to keep harmonics under control and to keep stress levels within the material fatigue diagrams.

The SUPERTECH retainers are made of titanium alloy and CNC machined for the best possible fit.

Technical specification

• Spring type: single (outer)
• Outer diameter of the spring: 25.40mm
• Inner diameter of the spring: 18.20mm
• Spring seat pressure: see below
• Reference: PAC-E99862

CATCAMS has been recognised worldwide for years for its expertise in camshafts and in the parts that go with them (valve springs, mechanical cam followers, vernier cam pulleys and so on), thanks to its know-how and its detailed study of engines and applications. Every camshaft profile and every spring rate has indeed been developed to suit the specific features of each engine, and also the intended use: road, sport, rally, run or circuit.

Depending on the model, the CATCAMS spring retainers are made of steel or aluminium.