Tomei 163022 Valve Springs Set KIT Type B Skyline R33 GT-R RB25DETT Quick Item Details: · 10.25 mm lift · Great for high revving · Required for Tomei Procams (RB25DE/T- B Type- w/Intake Retainer- Only Solid- 10.25mm Lift) Built for the (95-98) Nissan Skyline... At Tomei Powered, they have valve springs for many applications. Their R+D departments target was to develop valve springs with the best overall material and surface hardened finish for delivering the best performance results when needed. With many test prototypes they have the best final end product to deliver satisfaction and results. These were made for high RPM and high power tuned engines that are running high lift and big profile camshafts. Each Tomei Type-B valve spring kit includes a complete set of valve springs and retainers.

Type A
Max lift ~8.50mm
Note: For Hydraulic lash adjuster camshafts

High quality designed springs is required to transfer the exact movement of the camshaft to the valves at high engine speeds on high performance engines. The TOMEI products are always engineered with precision in mind to suit the user’s needs. So with this in mind careful choices in material selection is made with surface coating and other technologies. Then the pre-production products are put through an extensive testing program for checking durability, quality and performance. We spend time and money to help you save your valuable time and money.

Development target
Reliability in high RPM, and improvement in an initial response　
High durability against metal fatigue
High durability against the shocks from jump and bounce　
High durability against surging　
High sag resistance