SUPERTECH / CATCAMS uprated dual valve springs, BMW M3 E46 Z3M Z4M S54B32

The SUPERTECH and CATCAMS uprated valve spring kits are made up of 24 springs, 24 retainers and 24 spring seats.

Technical specification

• Spring type: dual
• Inner spring outside diameter: 19.30mm
• Inner spring inside diameter: 14.50mm
• Outer spring outside diameter: 26.40mm
• Outer spring inside diameter: 19.30mm
• Seat pressure / installed length: 37.20kg @ 41.00mm
• Seat pressure / at lift: 84.37kg @ 10.00mm
• Max lift: 14.50mm

SUPERTECH valve springs are made from a high grade chrome silicon vanadium steel alloy. This alloy delivers superior performance and reliability, particularly at high engine speeds, and offers better structural memory. SUPERTECH uprated valve springs are computer designed so that harmonics stay under control and stress levels remain within the material fatigue diagrams.

SUPERTECH retainers are machined from titanium alloy on CNC equipment for the closest possible fit.

Technical specification

• Spring type: dual
• Inner spring outside diameter: 21.30mm
• Inner spring inside diameter: 16.30mm
• Outer spring outside diameter: 28.60mm
• Outer spring inside diameter: 21.40mm
• Spring seat pressure: see below
• Retainer material: steel

CATCAMS has built a worldwide reputation over many years for its camshafts and related parts (valve springs, mechanical cam followers, vernier cam pulleys and more), thanks to its know-how and its detailed study of engines and applications. Every camshaft profile and every spring rate is developed to suit the specific features of each engine, and also the intended use: road, sport, rally, run or circuit.

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