Supertech Valve Spring Set of 12 for GR Yaris

Price is for a set of 12.

Supertech Beehive Valve Spring Set

• Rate: 12.8lbs/mm
• Spring Top OD: 21.30mm
• Spring Bottom OD: 26.20mm
• Coil Bind: 25.30mm

As we are all learning the weakest link in a high power GR Yaris is the valvetrain, we believe that a lot of engine failures are initially caused by valvetrain failure. 

Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions.

Designed for higher performance and durability at high RPM's

For use in turbocharged hi stress engines with increased boost levels.

Fensport Tip: Valve float at high boost is a problem on the G16E-GTS engine which can cause valvetrain failure.
We recommend these to anyone running over 1.6bar of boost even on the stock turbo, we ran into heavy misfires caused by valve float from 1.8 bar onwards on a G25-660 but we have heard of people experiencing valve float symptoms very early on in their tuning as low as 1.6bar on the stock turbo so we highly recommend these as "cheap insurance" for your engine if you intend to tune it and use it hard.