The Supertech Performance Valve Spring & Retainer Set is specifically designed for individuals seeking to enhance the powerband of their 3.0T Supercharged EA837 or 2.9T/3.0T Turbocharged EA839 engine beyond the 7,200 - 7,600 RPM range while maintaining safety. This comprehensive kit offers a two-pronged approach by increasing the spring rates and reducing the mass of the retainer using durable titanium material. Using titanium ensures an acceptable fatigue life for most street applications, excluding those with exceptionally high mileage.

The titanium retainer complements the elevated spring rates and permits longer springs, effectively preventing coil binding and accommodating camshafts with higher lift than the factory specifications. With this valve spring and retainer set, engine enthusiasts can confidently push their RPM limits up to 8,000 RPM, with occasional use up to 8,500 RPM reported on hydraulic lifters.

For individuals aiming for even higher RPM gains, converting to solid lifter buckets allows for further exploration, as the spring rates are more than adequate. However, it is important to consider upgrading to enhanced rods when exceeding 8,000 RPM to ensure optimal engine durability and reliability.

Experience the benefits of the Supertech Performance Valve Spring & Retainer Set, which will unlock the full potential of your engine and deliver improved power delivery in the higher RPM range.

SPRING DATA:

• Seat Pressure - 73lbs @ 38.60mm (Intake), 85lbs @ 37.20mm (Exhaust)
• Open (Lift) Pressure - 178lbs @ 10mm (Intake), 190lbs @ 10mm (Exhaust)
• Max lift - 12.50mm (Intake), 11.00mm (Exhaust)
• Spring Coil Bind - 24.90mm
• Rate - 10.50lbs/mm
• Spring Outer Diameter - 24.00mm
• Spring Inner Diameter - 16.50mm

WHAT’S INCLUDED:

• Single Springs - 24pcs
• Titanium Retainers - 24pcs